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US005394258A
United States Patent [19] [li] Patent Number: 5,394,258
Morin et al. [45] Date of Patent: Feb. 28,1995
[54] ACTIVE MATRIX DISPLAY SCREEN WITH
STORAGE CAPACITORS FORMED OF
CONDUCTIVE BLOCKS,
S EM ICON DUCTIVE MATERIAL,
NONCONDUCTTVE MATERIAL, AND
CAPACITIVE LINES
[75] Inventors: Francois Morin; Michel le Contellec, both of Lannion, France
[73] Assignee: France Telecom Etablissement
Autonome de Droit Public (Centre
National d'Etudes des
Telecommunications), Issy les
Moulineaux, France
[21] Appl. No.: 264,199
A liquid crystal display screen including a substrate with conductive addressing columns and conductive blocks, each including a block lengthening piece, a layer of semiconductive material followed by a layer of nonconductive material formed on the addressing columns and conductive blocks, and conductive addressing lines formed on the nonconductive material and each overlapping a block lengthening piece. The block lengthening pieces, the conductive addressing columns, and the conductive addressing lines form addressing transistors. Also, capacitive lines are formed on the nonconductive material and overlap the conductive blocks such that the conductive blocks, the semiconductive material, the nonconductive material, and the capacitive lines form storage capacitors.
