公开(公告)号：DE602004024448D1

公开(公告)日：2010-01-14

申请号：DE602004024448

申请日：2004-12-15

Applicant: IBM

Inventor： CHAN VICTOR ,  FISCHETTI MASSIMO V ,  HERGENROTHER JOHN M ,  LEONG MEIKEI ,  RENGARAJAN RAJESH ,  REZNICEK ALEXANDER ,  SOLOMON PAUL ,  SUNG CHUN-YUNG ,  YANG MIN

IPC: H01L29/02 ,  H01L21/762 ,  H01L21/8238 ,  H01L29/04 ,  H01L29/786 ,  H01L31/109

Abstract: The present invention provides a semiconductor material that has enhanced electron and hole mobilities that comprises a Si-containing layer having a crystal orientation and a biaxial compressive strain. The term “biaxial compressive stress” is used herein to describe the net stress caused by longitudinal compressive stress and lateral stress that is induced upon the Si-containing layer during the manufacturing of the semiconductor material. Other aspect of the present invention relates to a method of forming the semiconductor material of the present invention. The method of the present invention includes the steps of providing a silicon-containing layer; and creating a biaxial strain in the silicon-containing layer.

公开(公告)号：AT427563T

公开(公告)日：2009-04-15

申请号：AT06777968

申请日：2006-07-25

Applicant: IBM

Inventor： DORIS BRUCE ,  COSTRINI GREGORY ,  GLUSCHENKOV OLEG ,  LEONG MEIKEI ,  SEONG NAKGEUON

IPC: H01L27/11 ,  H01L21/8244

Abstract: The present invention relates to a semiconductor device structure that includes at least one SRAM cell formed in a substrate. Such SRAM cell comprises two pull-up transistors, two pull-down transistors, and two pass-gate transistors. The pull-down transistors and the pass-gate transistors are substantially similar in channel widths and have substantially similar source-drain doping concentrations, while the SRAM cell has a beta ratio of at least 1.5. The substrate preferably comprises a hybrid substrate with at two isolated sets of regions, while carrier mobility in these two sets of regions differentiates by a factor of at least about 1.5. More preferably, the pull-down transistors of the SRAM cell are formed in one set of regions, and the pass-gate transistors are formed in the other set of regions, so that current flow in the pull-down transistors is larger than that in the pass-gate transistors.

公开(公告)号：AT450892T

公开(公告)日：2009-12-15

申请号：AT04822326

申请日：2004-12-15

Applicant: IBM

Inventor： CHAN VICTOR ,  FISCHETTI MASSIMO ,  HERGENROTHER JOHN ,  LEONG MEIKEI ,  RENGARAJAN RAJESH ,  REZNICEK ALEXANDER ,  SOLOMON PAUL ,  SUNG CHUN-YUNG ,  YANG MIN

IPC: H01L29/02 ,  H01L21/762 ,  H01L21/8238 ,  H01L29/04 ,  H01L29/786 ,  H01L31/109

Abstract: The present invention provides a semiconductor material that has enhanced electron and hole mobilities that comprises a Si-containing layer having a crystal orientation and a biaxial compressive strain. The term “biaxial compressive stress” is used herein to describe the net stress caused by longitudinal compressive stress and lateral stress that is induced upon the Si-containing layer during the manufacturing of the semiconductor material. Other aspect of the present invention relates to a method of forming the semiconductor material of the present invention. The method of the present invention includes the steps of providing a silicon-containing layer; and creating a biaxial strain in the silicon-containing layer.

公开(公告)号：DE602006006088D1

公开(公告)日：2009-05-14

申请号：DE602006006088

申请日：2006-07-25

Applicant: IBM

Inventor： DORIS BRUCE ,  COSTRINI GREGORY ,  GLUSCHENKOV OLEG ,  LEONG MEIKEI ,  SEONG NAKGEUON

IPC: H01L27/11 ,  H01L21/8244

Abstract: The present invention relates to a semiconductor device structure that includes at least one SRAM cell formed in a substrate. Such SRAM cell comprises two pull-up transistors, two pull-down transistors, and two pass-gate transistors. The pull-down transistors and the pass-gate transistors are substantially similar in channel widths and have substantially similar source-drain doping concentrations, while the SRAM cell has a beta ratio of at least 1.5. The substrate preferably comprises a hybrid substrate with at two isolated sets of regions, while carrier mobility in these two sets of regions differentiates by a factor of at least about 1.5. More preferably, the pull-down transistors of the SRAM cell are formed in one set of regions, and the pass-gate transistors are formed in the other set of regions, so that current flow in the pull-down transistors is larger than that in the pass-gate transistors.