Patent ID: 9601540
Date: 2017-03-21
CPC Classifications: H01L

Claim:
1. A method for producing a semiconductor device comprising: preparing a wafer having a plurality of portions each of which serves as a semiconductor device and having an insulator having a plurality of openings on the plurality of respective portions; forming an embedding member in each of the plurality of openings and on the insulator; partly removing the embedding member formed on the insulator; and after the partly removing of the embedding member, planarizing the embedding member, wherein the plurality of portions have a first portion and a second portion positioned at an outer side of the wafer than the first portion, the first portion has a first region and a second region at a position different from a position of the first region, and the second portion has a third region and a fourth region at a position different from a position of the third region, the plurality of openings in the first portion are disposed in the first region with a density higher than a density in the second region, and the plurality of openings in the second portion are disposed in the third region with a density higher than a density in the fourth region, and the partly removing of the embedding member includes: a first removal process in which a part of the embedding member positioned in the second region and a part of the embedding member positioned in the fourth region are removed by etching using a first resist pattern as a mask; and a second removal process in which at least a part of the embedding member positioned in the second region is removed by etching using a second resist pattern as a mask while a third resist pattern is positioned on at least a part of the embedding member positioned in the fourth region, wherein a first removal amount in the partly removing of the embedding member positioned in the second region and a second removal amount in the partly removing of the embedding member positioned in the fourth region are different from each other.