发明名称 ELECTRONIC DEVICE MANUFACTURE WITH DEPOSITION OF MATERIAL, PARTICULARLY CADMIUM MERCURY TELLURIDE
摘要 In the manufacture of an electronic device, e.g. an infrared detector of cadmium mercury telluride, a gas stream (36) comprising two or more reactants is passed over a heated substrate (29) in a reaction zone (C) of a reactor vessel (1) so as to deposit material in a layer (30) on the substrate (29). One reactant, e.g. a readily decomposible cadmium alkyl (Me2Cd), is supplied to the reaction zone (C) by means of an injection tube (12) which passes through a heated first zone (A) of the vessel (1). The tube (12) has a narrow bore (y) to provide a high flow velocity for this reactant (Me2Cd) through the first zone (A). In accordance with the invention, the tube (12) widens in at least one dimension (x), towards its outlet end, so as to provide a wider outlet for injecting the reactant (Me2Cd) into the gas stream (38,36) with a lower flow velocity which matches more closely the flow velocity of the gas stream (38,36). A more balanced mixing is achieved leading to improved compositional homogeneity in the deposited layer (30), even for difficult materials such as cadmium mercury telluride. The heated first zone (A) may comprise a capsule (2) containing e.g. a pool of mercury (3), and such a capsule (2) preferably has an outlet (a) of smaller cross-sectional area within which the widened outlet of the injection tube (12) is concentrically arranged so that the gas stream (38) is symmetrically constricted around the outlet of the injection tube (12).
申请公布号 GB2213837(A) 申请公布日期 1989.08.23
申请号 GB19870029875 申请日期 1987.12.22
申请人 * PHILIPS ELECTRONIC AND ASSOCIATED INDUSTRIES LIMITED 发明人 PETER ARTHUR CHARLES * WHIFFIN;CHRISTOPHER DAVID * MAXEY;BRIAN COLIN * EASTON
分类号 C30B25/02;C30B25/14;H01L21/365 主分类号 C30B25/02
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