US2018012760A1PendingUtilityA1

Devices and methods of forming sadp on sram and saqp on logic

Assignee: GLOBALFOUNDRIES INCPriority: Jul 8, 2016Filed: Aug 11, 2017Published: Jan 11, 2018
Est. expiryJul 8, 2036(~10 yrs left)· nominal 20-yr term from priority
H10P 50/695H01L 21/0335H01L 27/1116H01L 27/1104H01L 21/0338H01L 21/0337H10D 1/00H10B 10/18H10B 10/12
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Claims

Abstract

Devices and methods of fabricating integrated circuit devices with reduced cell height are provided. One method includes, for instance: obtaining an intermediate semiconductor device having a substrate including a logic area and an SRAM area, a fin material layer, and a hardmask layer; depositing a mandrel over the logic area; depositing a sacrificial spacer layer; etching the sacrificial spacer layer to define a sacrificial set of vertical spacers; etching the hardmask layer; leaving a set of vertical hardmask spacers; depositing a first spacer layer; etching the first spacer layer to define a first set of vertical spacers over the logic area; depositing an SOH layer; etching an opening in the SOH layer over the SRAM area; depositing a second spacer layer; and etching the second spacer layer to define a second set of spacers over the SRAM area.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . An intermediate semiconductor device comprising:
 a substrate including a logic area and an SRAM area,   a fin material layer,   a first set of vertical spacers over the logic area; and   a second set of spacers over the SRAM area.   
     
     
         2 . The device of  claim 1 , wherein the first and second sets of spacers comprise an oxide material. 
     
     
         3 . The device of  claim 1 , wherein the first set of spacers comprises a multiple of 4 spacers. 
     
     
         4 . The device of  claim 1 , wherein the second set of spacers comprises a multiple of 2 spacers.

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