Thomson-Csf

Michel Villard

Andre Nicollet

Michel Favre

Yves Henry

Christiane Baylac

Arnaud De Panafieu

Henry Yves

A method for forming indium antimonide photodiodes by ionic implantation of the S.sub.34.sup.+ isotope of sulphur on a p type indium antimonide substrate. These photodiodes may be readily coupled to an N channel charge transfer device which provides multiplexing of the photodiodes and readout of the charges.

Process of manufactoring an indium antimonide photodiode

The surface of a substrate which includes a plurality of photovoltaic junctions spaced along it is prepared as follows: a first anodic oxide layer is formed to cover the whole surface of the substrate and ensures perfect control of the photovoltaic junctions, a second layer is deposited of metal which is impervious to the radiation to be detected, then through photolithography, only the zones of the second layer that it is desired to render impervious to the radiation to be detected are maintained and the remainder removed; and finally, a layer of dielectric material is deposited to cover the whole surface.

Process of manufacturing a photosensitive device having a plurality of

A process yielding a glass blank in the form of a rod intended for drawing an optical fiber of the kind of self-focussing fiber i.e. having a radial refractive index gradient, having features (substantially transparency or transmission efficiency) lower than those of the fibers intended for long distance communication but sufficient for middle distance transmission, and which exhibits a lower cost than known processes. In a first stage a phase separation yields a 'hard' phase (rich in silicon) and a 'soft' phase (poor in silicon and rich in impurities) due to the drawing of a rod from a bath of molten glass through a cooling system having a strong temperature gradient and creating a radial refractive index gradient. In a second stage the soft phase is leached, eliminating the impurities contained in the soft phase but keeping safe the radial gradient. In a third stage a consolidation treatment is a pure annealing treatment rendering the hard phase more homogeneous.

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Paris, France

Michel Villard