×

Semiconductor integrated circuit device and method for manufacturing the same

  • US 20050221561A1
  • Filed: 03/22/2005
  • Published: 10/06/2005
  • Est. Priority Date: 04/06/2004
  • Status: Active Grant
First Claim
Patent Images

1. A semiconductor integrated circuit device comprising:

  • a semiconductor substrate including an SRAM region and a ROM region;

    a plurality of SRAM memory cells, each of which is formed in the SRAM region and includes a flip-flop, a pair of first conductivity type access transistors connected to the flip-flop and a pair of SRAM bit lines connected to the paired access transistors, respectively; and

    a plurality of ROM memory cells, each of which is formed in the ROM region and includes a first conductivity type ROM transistor and a ROM bit line connected to the ROM transistor, wherein the SRAM memory cells connected to each pair of SRAM bit lines are smaller in number than the ROM memory cells connected to the ROM bit line and the ROM transistor has a larger channel width than the access transistors.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×