U.S. Philips Corporation

Peugeot Citroen Automobiles Sa

Jean-Marc Auger

Philippe Autier

Marko Erman

Olivier Sauvage

Jean-Mard Eickhoff

Pierre Burry

Cyril Perronnet

A semiconductor device comprising an integrated optical guide, which has at least one rectilinear part and one curved part, and comprising means for obtaining the confinement of the light in the guide in the curved part, which means include a groove provided along the edge of the guide in the region of the curve part, characterized in that these means also include a guide structure comprising a guiding layer and, overhanging the guiding layer, a ribbon in relief for determining the optical path followed by the light in the guiding layer, and in that these means moreover include a groove structure such that it has a constant depth, that its central part follows extactly the edge of the guiding ribbon in the curved part, that its ends are removing from the edge of this ribbon at the beginning and at the end of the curved part, that its bottom is disposed in the guiding layer at a level which does not reach the lower part of this guiding layer.

Semiconductor device comprising an integrated optical guide, which has

A method of manufacturing semiconductor devices comprising at least a reactive ion etching step of a so-called substrate formed by semiconductor compounds having the general formulae Ga.sub.1-x As.sub.x In.sub.1-y P.sub.y, in which formulae x and y are the concentrations and lie between 0 and 1, this method comprising for carrying out this etching step a masking system of the said substrate cooperating with a flow of reacting gases, characterized in that the masking system is formed by a first metallic layer of titanium (Ti) of small thickness, on which a second metallic layer of nickel (Ni) is disposed having a thickness of about ten times larger, and in that the flow of reacting gases is formed by the mixture of the gases Cl.sub.2 /CH.sub.4 /H.sub.2 /Ar, in which mixture Cl.sub.2 is present in a quantity of about a quarter of the quantities of CH.sub.4 and Ar, as far as the partial pressures in the etching chamber are concerned. Application: Manufacture of optoelectronic devices of III-V materials.

Method of manufacturing semiconductor devices including at least a

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Joinville-le-Pont, France

Jean-Marc Auger