France Telecom Etablissement Autonome De Droit Public

France Telecom Etablissement Autonome De Droit Public (centre National

Michel Le Contellec

Francois Morin

Yannick Chouan

Serge Saada

A display screen having an optical mask and a process for producing the screen. The screen includes an optical mask formed of opaque conducting rows formed below addressing rows. Storage capacitors are formed overlapping the opaque conducting rows with an array of electrodes. The invention finds particular utility in the field of displays.

Display screen having opaque conductive optical mask and TFT of

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.

Active matrix display screen with storage capacitors formed of

The apparatus incorporates a h.f. source (2), a plasma enclosure ( 4 ) having gas supplies, a vacuum pump (50), elements for coupling the source to the plasma enclosure, which is of a non-radiating type and which is shaped like a rectangular parallelepiped with first and second dielectric material faces parallel to the direction of the magnetic field and a third face having a rectangular opening (14) parallel to said field for forming a ribbon-like plasma, a treatment enclosure containing a mobile sample holder (18) communicating via the opening with the plasma enclosure. The coupling means have two linear waveguides (30, 38 ) with a rectangular cross-section oriented in the wave propagation direction and located on either side of the plasma enclosure, a horn (36) for coupling one of the guides to the plasma enclosure, whose cross-section widens in the magnetic field direction, the other guide being provided with a short-circuit (46).

Chemical treatment plasma apparatus for forming a ribbon-like plasma

The method includes only two masking levels. During the second masking, capacitative lines (LC) (dedicated or merged with the addressing lines) are defined which overlap the pixels so as to form the storage capacitors (Cs). Application for display on flat liquid crystal screens.

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Lannion, France

Michel Le Contellec