公开(公告)号：US20040248349A1

公开(公告)日：2004-12-09

申请号：US10726005

申请日：2003-12-01

Applicant: STMicroelectronics S.r.l.

Inventor： Crocifisso Marco Antonio Renna ,  Luigi La Magna ,  Simona Lorenti ,  Salvatore Coffa

IPC: H01L021/336

CPC classification number: B81C1/00047 ,  B81B2201/0257 ,  B81C2201/0115 ,  B81C2201/0116 ,  H01L21/302 ,  H01L21/306 ,  H01L21/76243 ,  H01L21/764 ,  H01L29/0649 ,  H04R19/005

Abstract: A method for manufacturing a semiconductor substrate of a first concentration type is described, which comprises at least a buried insulating cavity, comprising the following steps: forming on the semiconductor substrate a plurality of trenches, forming a surface layer on the semiconductor substrate in order to close superficially the plurality of trenches forming in the meantime at least a buried cavity in correspondence with the surface-distal end of the trenches.

Abstract translation: 描述了一种用于制造第一浓缩型半导体衬底的方法，至少包括掩埋绝缘腔，包括以下步骤：在半导体衬底上形成多个沟槽，在半导体衬底上形成表面层，以便 在表面上紧密地闭合形成与沟槽的表面 - 远端相对应的至少一个掩埋腔的多个沟槽。