PROCEDE DE REALISATION DE MATRICES DECOMMANDE A DIODES POUR ECRAN PLAT DE VISUALISATION ELECTRO-OPTIQUE ET ECRAN PLAT REALISE PAR CE PROCEDE

• Main Author: NICOLAS SZYDLO, JEAN-NOEL PERBET ET NICOLE PROUST
• Format: Patent
• Language: French
• Published: 03.10.1986
• Edition: 4
• Subjects: BASIC ELECTRIC ELEMENTS; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEMICONDUCTOR DEVICES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROCEDE DE REALISATION DE MATRICES DE COMMANDE A DIODES POUR ECRAN PLAT DE VISUALISATION ELECTRO-OPTIQUE PREVOYANT DE DEPOSER SUR UN SUBSTRAT 1 UNE COUCHE DE MATERIAU CONDUCTEUR 2 ET DE GRAVER DANS CETTE COUCHE LES ELECTRODES E ET LES CONDUCTEURS DE COMMANDE C. L'ENSEMBLE EST ENSUITE REVETU D'UNE COUCHE SEMI-CONDUCTRICE AMORPHE NON DOPEE 4, D'UNE COUCHE SEMI-CONDUCTRICE AMORPHE DOPEE 5, D'UNE DEUXIEME COUCHE D'UN MATERIAU CONDUCTEUR 6. DANS CES TROIS COUCHES SONT GRAVES DES PLOTS (OU ELEMENTS DE COMMANDE) RELIANT LES ELECTRODES E AUX CONDUCTEURS DE COMMANDE C.L'INVENTION EST APPLICABLE A LA REALISATION D'ECRANS DE VISUALISATION A CRISTAL LIQUIDE. Diode-type control matrix arrays for electrooptical flat-panel screens which find application in liquid-crystal displays are fabricated by depositing a layer of conductive material on a substrate and etching the control electrodes and control leads in this layer. The entire structure is then coated with an undoped amorphous semiconductor layer, with a doped amorphous semiconductor layer, and with a second layer of conductive material. In these three layers are etched terminal areas (or control elements) for connecting the control electrodes to the control leads.