Abstract:
PROBLEM TO BE SOLVED: To prevent breakage of a wafer in carrying in/out the wafer by preventing adhesion of the wafer to an electrode.SOLUTION: This method of etching a back side of a wafer, for instance, in an MEMS device includes: a protective film formation process of forming a protective film (protective resist) 25 formed of positive photoresist on the whole of the front surface of a processed wafer 20; a protective film hardening process of hardening the front surface of the protective resist 25 by drying the protective resist 25 by post-baking; an etching process of mounting the wafer 20 on a lower electrode 30, the front surface side of the wafer 20 facing the lower electrode 30, and of etching the back side of the wafer 20 in a predetermined pattern by a plasma etching method; and a wafer recovery process of recovering the wafer 20 by peeling the front surface side of the wafer 20 from the lower electrode 30.
Abstract:
PROBLEM TO BE SOLVED: To provide a MEMS microphone semiconductor device in which reliability is improved by suppressing entry of cutting water or cutting dust during processing for dicing, and to provide a method of manufacturing the same. SOLUTION: The MEMS microphone semiconductor device includes: a substrate; one or more semiconductor elements mounted on a first principal surface of the substrate; a case fixed on the first principal surface of the substrate for covering the one or more semiconductor elements; a through-hole which is formed on the substrate or on the case and becomes a sound hole; and a plurality of connecting electrodes formed on a second principal surface, that is opposite to the first principal surface, of the substrate, wherein entry suppression shaping is applied to the through-hole so as to suppress the entry of cutting water during dicing. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a machine component of a MEMS or NEMS structure made of a monocrystalline silicon substrate. SOLUTION: This method includes steps of: forming fixed areas over the substrate in order to delimit the mechanical component; forming a lower protective layer made of material other than silicon and obtained by epitaxial growth from one face of the substrate on one face of the substrate; forming a silicon layer obtained by epitaxial growth from the lower protective layer on the lower protective layer; forming an upper protective layer on the silicon layer; etching the upper protective layer, the silicon layer, the lower protective layer according to a pattern for delimiting the mechanical component until the substrate is reached and an access route to the substrate is provided; forming a protective layer on the walls formed by etching the pattern of the mechanical component in the silicon layer grown in an epitaxial manner; and separating the mechanical component by performing isotropic etching in the substrate from the access route for the substrate to the substrate. The isotropic etching includes a step that does not invade the lower layer, the upper layer and the protective layer of the walls. COPYRIGHT: (C)2009,JPO&INPIT