US20060216957A1 - Integrated circuit package socket and socket contact - Google Patents
Integrated circuit package socket and socket contact Download PDFInfo
- Publication number
- US20060216957A1 US20060216957A1 US11/090,385 US9038505A US2006216957A1 US 20060216957 A1 US20060216957 A1 US 20060216957A1 US 9038505 A US9038505 A US 9038505A US 2006216957 A1 US2006216957 A1 US 2006216957A1
- Authority
- US
- United States
- Prior art keywords
- socket
- package
- contact
- contact pin
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 5
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 2
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 claims description 2
- 238000011109 contamination Methods 0.000 claims 1
- 239000000356 contaminant Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 3
- 238000007790 scraping Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008642 heat stress Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/02—Arrangements of circuit components or wiring on supporting structure
- H05K7/10—Plug-in assemblages of components, e.g. IC sockets
- H05K7/1053—Plug-in assemblages of components, e.g. IC sockets having interior leads
- H05K7/1061—Plug-in assemblages of components, e.g. IC sockets having interior leads co-operating by abutting
- H05K7/1069—Plug-in assemblages of components, e.g. IC sockets having interior leads co-operating by abutting with spring contact pieces
Definitions
- This disclosure relates to sockets that connect semiconductor packages to printed circuit boards and more specifically to the electrical contacts in the socket.
- PCBs printed circuit boards
- Current types of package connector configurations include Ball Grid Array (BGA) and Land Grid Array (LGA) which spread the electrical connectors across the bottom surface of the package.
- BGA Ball Grid Array
- LGA Land Grid Array
- One solution for connecting the BGA and LGA packages to a PCB utilizes a socket arranged to receive and connect a package to a PCB contact pad.
- the package is inserted into the socket and contacts within the socket electrically connect the connectors on the bottom surface of the package to the contact pad of the PCB.
- Sockets are generally appropriate for situations where packages are repeatedly inserted and replaced to and from a circuit board.
- An example of such use is a reference board used to showcase functional aspects of a chipset or processor in which different IC packages need to be quickly and effectively swapped out.
- Another example of socket use is in burn-in, testing and programming of IC packages during manufacturing. There, multiple sockets are mounted on a test board and IC packages are repeatedly inserted and tested as part of the IC package manufacturing process. And another example is the use of sockets on a motherboard allowing consumers to easily insert or replace IC packages.
- soldered contact pins or multi-piece contact pins. Both the soldered and multi-piece contact pins undesirably increase inductance and contact resistance between the package and the PCB. Further, installation and maintenance of soldered contact pins can add heat stress to the socket and to the PCB.
- Some multi-piece contact pins use pressure and surface penetration methods with springs to establish a connection between the end of the contact and the package land or contact pad. Installation and maintenance of the multi-piece contact pins, however, requires the extra cost and time of multiple piece assembly.
- Embodiments of the invention address these and other disadvantages in the prior art.
- FIG. 1 is a side elevation view of a contact for use in an integrated circuit (IC) package socket according to an embodiment of the invention.
- IC integrated circuit
- FIG. 2 is a side view of the contact of FIG. 1 taken along line 2 - 2 in FIG. 1 .
- FIG. 3 is a side cross-sectional view of an IC package socket according to another embodiment of the invention showing the socket with a Ball Grid Array IC package and a circuit board.
- FIG. 4 is a side cross-sectional view of an IC package socket according to another embodiment of the invention showing the socket with a Land Grid Array IC package and a circuit board.
- FIG. 5 is a cross-sectional view of the socket of FIG. 3 taken along line 5 - 5 in FIG. 3 showing the contact pin and contact pin support.
- FIGS. 6 A-B are detailed side cross-sectional views of the socket of FIG. 3 showing the contact pin swiping and engaging the BGA package land.
- FIG. 1 shows a side elevation view of a contact pin 20 for use in an integrated circuit (IC) package socket (see FIGS. 3-4 ) according to an embodiment of the invention.
- Contact pin 20 may be formed from a single piece of conductive material. When the contact pin 20 is formed from a single piece of conductive material, it has a lower contact resistance and lower inductance than current multi-piece contact pins.
- the contact pin 20 may be made out of a conductive material and most preferably is made out of a conductive material that also has good spring qualities such a Beryllium Copper alloy or the like.
- the contact pin 20 may include two acutely angled bends 24 and 26 positioned away from the middle portion 22 .
- the acutely angled bends 24 , 26 create resiliency in the first and second ends 28 and 30 when the contact pin 20 is stabilized at its middle portion 22 .
- the first and second ends 28 , 30 are sharply shaped to allow the ends 28 , 30 to scrape through buildup on package lands and contact pads such as oxide and other contaminants when engaging the package lands and contact pads. This scraping aspect will be further described below with reference to FIGS. 6 A-B.
- FIG. 2 is a side view of the contact pin 20 of FIG. 1 taken along line 2 - 2 .
- FIG. 2 shows the middle portion 22 notched for mounting in a socket.
- the notched middle portion 22 allows the contact pin 20 to be held in place thereby stabilizing the contact pin 20 at the middle portion 22 and allowing the first and second ends 28 , 30 to be independently resilient because of the acutely angled bends 24 and 26 .
- FIG. 3 shows a side cross-sectional view of IC package socket 40 with an array of single-piece contact pins 20 mounted in the package receiving area 43 according to another embodiment of the invention.
- the package receiving area 43 of socket 40 is shown with a package surface 47 below the Ball Grid Array (BGA) package 44 and an opposite contact pad surface 49 above the circuit board 42 .
- First ends 28 of the contact pins 20 are oriented toward the contact pads 46 on the circuit board 42 .
- Second ends 30 of the contact pins 20 are oriented toward the package ball lands 48 on the BGA package 44 .
- Each contact pin 20 is mounted in the socket 40 at a middle portion 22 of the pin 20 .
- the socket 40 stabilizes the middle portion 22 of each contact pin 20 thereby allowing the first and second ends 28 , 30 to independently resiliently contact the circuit board 42 and BGA package 44 .
- the contact pins 20 may be removably mounted on pin supports 60 for easy installation and individual replacement.
- FIG. 5 is a cross-sectional view of an embodiment of the pin support 60 holding the contact pin taken along line 5 - 5 in FIG. 3 .
- the contact pin 20 is mounted on the pin support 60 at the middle portion 22 with a friction fit and lock.
- a person of reasonable skill in the art should recognize other mounting and/or support configurations for contact pin 20 .
- FIG. 4 shows a side cross-sectional view of IC package socket 50 arranged to receive a Land Grid Array (LGA) package 54 .
- the socket 50 includes package receiving area 53 .
- An array of single-piece contact pins 20 is mounted in the receiving area 53 .
- the package receiving area 53 of socket 50 is shown with a package surface 57 below the LGA package 54 and an opposite contact pad surface 59 above the circuit board 52 .
- First ends 28 of the contact pins 20 are oriented toward the contact pads 56 on the circuit board 52 .
- Second ends 30 of the contact pins 20 are oriented toward the package lands 58 on the LGA package 54 .
- Each contact pin 20 is mounted in the socket 50 at a middle portion 22 of the pin 20 .
- the socket 50 stabilizes the middle portion 22 of each contact pin 20 thereby allowing the first and second ends 28 , 30 to independently resiliently contact the circuit board 52 and LGA package 54 .
- FIGS. 6A and 6B illustrate a second end 30 of a single-piece contact pin 20 engaging package land 48 of BGA package 44 .
- the contact pin 20 resiliently engages the package land 48 by bending open the acutely angled bend 26 .
- the sharply shaped second end 30 laterally swipes across the package land 48 , scraping and penetrating through any oxide or other contaminant buildup on the package land 48 .
- the lateral scraping of the package land 48 by the second end 30 ensures a good electrical connection between the BGA package 44 and the contact pin 20 , and thereby with the circuit board 44 (shown in FIG. 3 ).
- the same motion and engagement of the contact pin 20 occurs when a contact pin 20 engages an LGA package 54 and when the contact pin 20 engages a contact pad 46 on a circuit board 42 .
- the arrangement of supporting the contact pin 20 at its middle portion 22 allows the first and second ends 28 and 30 to independently resiliently contact and laterally swipe the contact pads and package lands.
- the sockets 40 and 50 shown in FIGS. 3 and 4 can be sockets arranged for performing burn-in, testing and programming of semiconductor packages. In that case, multiple sockets would be mounted on a single board and IC packages would be repeatedly installed and removed from the sockets.
- the circuit board 42 shown in FIGS. 3 and 4 can be any kind of printed circuit board used in any one of numerous applications including a motherboard with the sockets arranged to receive a processor package.
Abstract
Description
- This disclosure relates to sockets that connect semiconductor packages to printed circuit boards and more specifically to the electrical contacts in the socket.
- Connecting semiconductor packages to printed circuit boards (PCBs) has changed as the packages have become more highly integrated. Current types of package connector configurations include Ball Grid Array (BGA) and Land Grid Array (LGA) which spread the electrical connectors across the bottom surface of the package.
- One solution for connecting the BGA and LGA packages to a PCB utilizes a socket arranged to receive and connect a package to a PCB contact pad. The package is inserted into the socket and contacts within the socket electrically connect the connectors on the bottom surface of the package to the contact pad of the PCB.
- Sockets are generally appropriate for situations where packages are repeatedly inserted and replaced to and from a circuit board. An example of such use is a reference board used to showcase functional aspects of a chipset or processor in which different IC packages need to be quickly and effectively swapped out. Another example of socket use is in burn-in, testing and programming of IC packages during manufacturing. There, multiple sockets are mounted on a test board and IC packages are repeatedly inserted and tested as part of the IC package manufacturing process. And another example is the use of sockets on a motherboard allowing consumers to easily insert or replace IC packages.
- Currently IC package sockets employ soldered contact pins or multi-piece contact pins. Both the soldered and multi-piece contact pins undesirably increase inductance and contact resistance between the package and the PCB. Further, installation and maintenance of soldered contact pins can add heat stress to the socket and to the PCB.
- Some multi-piece contact pins use pressure and surface penetration methods with springs to establish a connection between the end of the contact and the package land or contact pad. Installation and maintenance of the multi-piece contact pins, however, requires the extra cost and time of multiple piece assembly.
- Embodiments of the invention address these and other disadvantages in the prior art.
-
FIG. 1 is a side elevation view of a contact for use in an integrated circuit (IC) package socket according to an embodiment of the invention. -
FIG. 2 is a side view of the contact ofFIG. 1 taken along line 2-2 inFIG. 1 . -
FIG. 3 is a side cross-sectional view of an IC package socket according to another embodiment of the invention showing the socket with a Ball Grid Array IC package and a circuit board. -
FIG. 4 is a side cross-sectional view of an IC package socket according to another embodiment of the invention showing the socket with a Land Grid Array IC package and a circuit board. -
FIG. 5 is a cross-sectional view of the socket ofFIG. 3 taken along line 5-5 inFIG. 3 showing the contact pin and contact pin support. - FIGS. 6A-B are detailed side cross-sectional views of the socket of
FIG. 3 showing the contact pin swiping and engaging the BGA package land. -
FIG. 1 shows a side elevation view of acontact pin 20 for use in an integrated circuit (IC) package socket (seeFIGS. 3-4 ) according to an embodiment of the invention. Contactpin 20 may be formed from a single piece of conductive material. When thecontact pin 20 is formed from a single piece of conductive material, it has a lower contact resistance and lower inductance than current multi-piece contact pins. Thecontact pin 20 may be made out of a conductive material and most preferably is made out of a conductive material that also has good spring qualities such a Beryllium Copper alloy or the like. - The
contact pin 20 may include two acutelyangled bends middle portion 22. The acutelyangled bends second ends contact pin 20 is stabilized at itsmiddle portion 22. The first andsecond ends ends -
FIG. 2 is a side view of thecontact pin 20 ofFIG. 1 taken along line 2-2.FIG. 2 shows themiddle portion 22 notched for mounting in a socket. Thenotched middle portion 22 allows thecontact pin 20 to be held in place thereby stabilizing thecontact pin 20 at themiddle portion 22 and allowing the first andsecond ends angled bends -
FIG. 3 shows a side cross-sectional view ofIC package socket 40 with an array of single-piece contact pins 20 mounted in thepackage receiving area 43 according to another embodiment of the invention. Referring toFIG. 3 , thepackage receiving area 43 ofsocket 40 is shown with apackage surface 47 below the Ball Grid Array (BGA)package 44 and an oppositecontact pad surface 49 above thecircuit board 42.First ends 28 of thecontact pins 20 are oriented toward thecontact pads 46 on thecircuit board 42.Second ends 30 of thecontact pins 20 are oriented toward thepackage ball lands 48 on the BGApackage 44. Eachcontact pin 20 is mounted in thesocket 40 at amiddle portion 22 of thepin 20. Thesocket 40 stabilizes themiddle portion 22 of eachcontact pin 20 thereby allowing the first andsecond ends circuit board 42 andBGA package 44. - The
contact pins 20 may be removably mounted on pin supports 60 for easy installation and individual replacement.FIG. 5 is a cross-sectional view of an embodiment of thepin support 60 holding the contact pin taken along line 5-5 inFIG. 3 . InFIG. 5 , thecontact pin 20 is mounted on thepin support 60 at themiddle portion 22 with a friction fit and lock. A person of reasonable skill in the art should recognize other mounting and/or support configurations forcontact pin 20. -
FIG. 4 shows a side cross-sectional view ofIC package socket 50 arranged to receive a Land Grid Array (LGA)package 54. Referring toFIG. 4 , thesocket 50 includespackage receiving area 53. An array of single-piece contact pins 20 is mounted in thereceiving area 53. Thepackage receiving area 53 ofsocket 50 is shown with apackage surface 57 below theLGA package 54 and an oppositecontact pad surface 59 above the circuit board 52.First ends 28 of thecontact pins 20 are oriented toward the contact pads 56 on the circuit board 52.Second ends 30 of thecontact pins 20 are oriented toward thepackage lands 58 on the LGApackage 54. Eachcontact pin 20 is mounted in thesocket 50 at amiddle portion 22 of thepin 20. Thesocket 50 stabilizes themiddle portion 22 of eachcontact pin 20 thereby allowing the first andsecond ends package 54. -
FIGS. 6A and 6B illustrate asecond end 30 of a single-piece contact pin 20engaging package land 48 of BGApackage 44. As the BGApackage 44 is lowered toward thecontact pin 20, thecontact pin 20 resiliently engages thepackage land 48 by bending open the acutelyangled bend 26. As thesecond end 30 resiliently engages thepackage land 48, the sharply shapedsecond end 30 laterally swipes across thepackage land 48, scraping and penetrating through any oxide or other contaminant buildup on thepackage land 48. The lateral scraping of thepackage land 48 by thesecond end 30 ensures a good electrical connection between theBGA package 44 and thecontact pin 20, and thereby with the circuit board 44 (shown inFIG. 3 ). - The same motion and engagement of the
contact pin 20 occurs when acontact pin 20 engages an LGApackage 54 and when thecontact pin 20 engages acontact pad 46 on acircuit board 42. The arrangement of supporting thecontact pin 20 at itsmiddle portion 22 allows the first andsecond ends - The
sockets FIGS. 3 and 4 can be sockets arranged for performing burn-in, testing and programming of semiconductor packages. In that case, multiple sockets would be mounted on a single board and IC packages would be repeatedly installed and removed from the sockets. - The
circuit board 42 shown inFIGS. 3 and 4 can be any kind of printed circuit board used in any one of numerous applications including a motherboard with the sockets arranged to receive a processor package. - The preceding embodiments are exemplary. Those of skill in the art will recognize that the concepts taught herein can be tailored to a particular application in many other advantageous ways. In particular, those skilled in the art will recognize that the illustrated embodiments are but one of many alternative implementations that will become apparent upon reading this disclosure.
- Although the specification may refer to an “one”, “another”, or “some” embodiment(s) in several locations, this does not necessarily mean that each such reference is to the same embodiment(s), or that the feature only applies to a single embodiment.
Claims (20)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/090,385 US7104803B1 (en) | 2005-03-25 | 2005-03-25 | Integrated circuit package socket and socket contact |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/090,385 US7104803B1 (en) | 2005-03-25 | 2005-03-25 | Integrated circuit package socket and socket contact |
Publications (2)
Publication Number | Publication Date |
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US7104803B1 US7104803B1 (en) | 2006-09-12 |
US20060216957A1 true US20060216957A1 (en) | 2006-09-28 |
Family
ID=36951677
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/090,385 Expired - Fee Related US7104803B1 (en) | 2005-03-25 | 2005-03-25 | Integrated circuit package socket and socket contact |
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Country | Link |
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US (1) | US7104803B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050227509A1 (en) * | 2004-04-12 | 2005-10-13 | Lloyd Shawn L | Making electrical connections between a circuit board and an integrated circuit |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7479015B2 (en) * | 2006-06-30 | 2009-01-20 | Intel Corporation | Socket assembly that includes improved contact arrangement |
US7950933B1 (en) * | 2010-08-04 | 2011-05-31 | Hon Hai Precison Ind. Co., Ltd. | Electrical socket having contact terminals floatably arranged therein |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5380210A (en) * | 1993-03-08 | 1995-01-10 | The Whitaker Corporation | High density area array modular connector |
US6186797B1 (en) * | 1999-08-12 | 2001-02-13 | Hon Hai Precision Ind. Co., Ltd. | Land grid array connector |
US20020048973A1 (en) * | 1998-11-30 | 2002-04-25 | Yu Zhou | Contact structure and production method thereof and probe contact assembly using same |
US6604950B2 (en) * | 2001-04-26 | 2003-08-12 | Teledyne Technologies Incorporated | Low pitch, high density connector |
US20040253846A1 (en) * | 2003-06-11 | 2004-12-16 | Epic Technology Inc. | Land grid array connector including heterogeneous contact elements |
US6877992B2 (en) * | 2002-11-01 | 2005-04-12 | Airborn, Inc. | Area array connector having stacked contacts for improved current carrying capacity |
US6921270B2 (en) * | 2003-06-11 | 2005-07-26 | Cinch Connectors, Inc. | Electrical connector |
US6945788B2 (en) * | 2003-07-31 | 2005-09-20 | Tyco Electronics Corporation | Metal contact LGA socket |
-
2005
- 2005-03-25 US US11/090,385 patent/US7104803B1/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5380210A (en) * | 1993-03-08 | 1995-01-10 | The Whitaker Corporation | High density area array modular connector |
US20020048973A1 (en) * | 1998-11-30 | 2002-04-25 | Yu Zhou | Contact structure and production method thereof and probe contact assembly using same |
US6186797B1 (en) * | 1999-08-12 | 2001-02-13 | Hon Hai Precision Ind. Co., Ltd. | Land grid array connector |
US6604950B2 (en) * | 2001-04-26 | 2003-08-12 | Teledyne Technologies Incorporated | Low pitch, high density connector |
US6877992B2 (en) * | 2002-11-01 | 2005-04-12 | Airborn, Inc. | Area array connector having stacked contacts for improved current carrying capacity |
US20040253846A1 (en) * | 2003-06-11 | 2004-12-16 | Epic Technology Inc. | Land grid array connector including heterogeneous contact elements |
US6921270B2 (en) * | 2003-06-11 | 2005-07-26 | Cinch Connectors, Inc. | Electrical connector |
US6945788B2 (en) * | 2003-07-31 | 2005-09-20 | Tyco Electronics Corporation | Metal contact LGA socket |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050227509A1 (en) * | 2004-04-12 | 2005-10-13 | Lloyd Shawn L | Making electrical connections between a circuit board and an integrated circuit |
US7241147B2 (en) * | 2004-04-12 | 2007-07-10 | Intel Corporation | Making electrical connections between a circuit board and an integrated circuit |
Also Published As
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US7104803B1 (en) | 2006-09-12 |
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