Patent ID: 8466037
Filing Date: 2013-06-18
Classification: H01L

Abstract:
1. A method for producing a plurality of thin film chips, each comprising an integrated circuit, the method comprising the steps of: providing a semiconductor wafer having a top side and a bottom side, producing a plurality of closed hidden wafer cavities near the top side, said closed hidden wafer cavities each having a lateral area extent that defines the chip area of one of said thin film chips above the respective wafer cavity, such that each chip area is substantially unsupported beneath the chip area, producing at least one integrated circuit structure in at least one defined chip area suspended above a respective wafer cavity, and separating the defined chip area from the semiconductor wafer, wherein the step of separating includes a first process sequence, wherein a plurality of trenches down to the closed hidden cavities are produced along a substantial majority portion of the entire lateral periphery of said defined chiparea such that the defined chip area is primarily held on the semiconductor wafer via separated, residual web-like connections, which are arranged at the lateral periphery of said chip area above the respective wafer cavity, and wherein the web-like connections are severed in a second process sequence by breaking the web-like connections.