Patent ID: 8193009
Filing Date: 2012-06-05
Classification: G01R,H01L

Abstract:
1. A method for constructing an apparatus for packaging an IC (integrated circuit) chip for optical testing, the method comprising the steps of: forming a package body comprising electrical connectors and wiring; forming a mounting plate having a first surface and a second surface, wherein the mounting plate is adapted to have an IC chip mounted thereto, and wherein the mounting plate is transparent to one or more wavelengths of light to allow photons to pass through the mounting plate between the first and second surfaces; attaching the mounting plate to the package body in a structural orientation wherein a front surface of an IC chip mounted to the mounting plate is electrically accessible and a back surface of the IC chip is optically accessible; mounting a back surface of an IC chip to the first surface of the mounting plate; and disposing an index matching material between the back surface of the IC chip and the first surface of the mounting plate, wherein the index matching material comprises an index of refraction which has a value between an index of refraction of material of the mounting plate and an index of refraction of substrate material of the IC chip.