Patent ID: 6127244
Filing Date: 2000-10-03
Classification: H01L,Y10S

Abstract:
A method of fabricating a semiconductor device, comprising the steps of:preparing a first and a second silicon substrates;implanting impurities into selected active regions of the first silicon substrate to a desired depth;etching the portion of the silicon substrate between the active regions to form trenches having a desired depth;forming a first insulating layer on the first silicon substrate to be filled in the trenches;etching-back the first insulating layer to form an isolation film which is formed within the trenches;forming a second insulating layer on the first silicon substrate including the isolation film;bonding the first and the second silicon substrates to contact the second insulating layer film with the second silicon substrate;firstly polishing the first silicon substrate by the vicinity of the portion of the first silicon substrate where the impurities are implanted;etching the polished first silicon substrate by using an etchant until the portion of the first silicon substrate where the impurities are implanted, is removed; andsecondarily polishing the first silicon substrate using the isolation film as a polishing stopper.