 Photographic supports and elements utilizing photobleachable omicron-nitroarylidene dyes |
| I claim: 1. A process for preparing a photographic image which comprises imagewise exposing to ... |
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| Photo-imaging utilizing alkali-activated photopolymerizable compositions |
| What is claimed is: 1. The method of forming a polymeric image which comprises: a. providing photo-... |
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| Stabilization of photosensitive recording material |
| We claim: 1. A recording process including image stabilization comprising the steps of: 1. image-... |
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| Photopolymerization using an alpha-aminoacetophenone |
| I claim as my invention: 1. In a process for the photopolymerization of a polymerizable monomer ... |
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| Substituted (4-carboxyphenoxy) phenyl alkane compounds |
| We claim: 1. A compound of the formula: ##STR34## wherein R.sub.1 is a C.sub.1 to C.sub.7 alkyl ... |
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| Method for desensitization of a color developer |
| OF THE INVENTION According to the process of this invention, drying at the time of desensitization ... |
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| Polymerizable esters |
| I claim: 1. An ester as a composition of matter, which is soluble in an aqueous solution of a base ... |
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| Facsimile color bleaching copying method |
| In order to make coloured copies of pictures, drawings, etc., a method is provided, by which a ... |
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Optoelectronic switching and display device with porous silicon
| Details |
Inventors: Namavar, Fereydoon; Kalkhoran, Nader M.; Maruska, H. Paul;
Assignee: Spire Corporation (Bedford, MA)
Primary Examiner: Mintel; William
Assistant Examiner:
Attorney, Agent or Firm: Morse, Altman, Dacey & Benson
A solid state optoelectronic switching and display device and a method for its manufacture are disclosed. The device, formed in silicon, essentially is a surface-emitting visible light-emitting diode that allows rapid and efficient switching and information transfer, via optical means, between IC's, PC boards and displays in a computer. The method essentially includes electrochemically etching a silicon wafer to form a porous silicon region therein, depositing a transparent semiconductor layer on the porous silicon region, and forming a back contact on the wafer. |
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DETAILED DESCRIPTION It is a principal object of the present invention to overcome the above shortcomings by providing a solid state optoelectronic switching and display device for high powered computers that employs light, rather than electricity, for data transmission and display, and a method for its manufacture.
More specifically, it is an object of the present invention to provide a solid state optoelectronic switching and display device, formed in silicon, that essentially comprises a silicon wafer having opposed flat surfaces, a porous silicon region formed in the silicon wafer adjacent one of the opposed flat surfaces, and a transparent semiconductor layer deposited on the porous silicon region of the silicon wafer.
The formation of a back contact layer adjacent the other of the opposed flat surfaces of the silicon wafer and the provision of means for applying a voltage potential between the back contact layer and the transparent semiconductor layer completes the formation of the solid state optoelectronic switching and display device.
The device is essentially a surface-emitting visible light-emitting diode that employs light beams instead of electricity to transmit and to display data, and does so rapidly and efficiently.
The silicon substrate and the transparent semiconductor layer are of opposed polarity, i.
e.
, when one is of p-type, the other must be of n-type.
Other objects of the present invention will in part be obvious and will in part appear hereinafter.
The invention accordingly comprises the product and the process of the present disclosure, its components, parts and their interrelationships, the scope of which will be indicated in the appended claims.
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Quantum Computing 
