Patent ID: 9691864
Date: 2017-06-27
CPC Classifications: H01L

Claim:
1. A method for manufacturing a semiconductor device, the method comprising: providing a semiconductor substrate having a first side; forming at least one recess in the semiconductor substrate, the at east one recess having a bottom and a sidewall extending from the bottom to the first side of the semiconductor substrate; forming an auxiliary structure on the sidewall and the bottom of the at least one recess and forming a hollow space within the at least one recess; filling the hollow space of the at least one recess with a filling material for forming a filling structure in the at least one recess; removing portions of the auxiliary structure from the sidewall of the at least one recess so as to form at least one cavity between the filling structure and the sidewall of the at least one recess; and sealing the at least one cavity at the first side of the semiconductor substrate.