Patent ID: 8841213
Filing Date: 2014-09-23
Classification: B23K,H01L,H05K

Abstract:
1. A method for manufacturing an interposer equipped with a plurality of through-hole electrodes, the method comprising: a laser light converging step of converging a laser light at a sheet-like object to be processed made of silicon so as to form a modified region in the object; an etching step of anisotropically etching the object after the laser light converging step so as to advance etching selectively along the modified region and form a plurality of through holes in the object, each through hole having a rectangular cross section; an insulating film forming step of forming an insulating film on an inner wall of each through hole after the etching step; and a through-hole electrode forming step of inserting a conductor into the through holes so as to form the through-hole electrodes after the insulating film forming step; wherein the plurality of through holes are aligned in rows, each through hole of one row having a different tilt angle with respect to a neighboring hole in the one row, and neighboring rows being arranged so that the through holes of the respective rows are staggered towards each other.