Patent ID: 9601427
Date: 2017-03-21
CPC Classifications: H01L

Claim:
1. A semiconductor device, comprising: a first metal wiring layer formed on a substrate; an interlayer insulating film formed on the first metal wiring layer; a second metal wiring layer formed on the interlayer insulating film; a first resistor including a first resistance metal film formed between the first metal wiring layer and the second metal wiring layer, a first insulating film formed on the first resistance metal film, and a second resistance metal film formed on the first insulating film and being different in a sheet resistance from the first resistance metal film; and a second resistor including a third resistance metal film formed between the first metal wiring layer and the second metal wiring layer, a second insulating film formed on the third resistance metal film, and a fourth resistance metal film formed on the second insulating film and being different in a sheet resistance from the third resistance metal film; wherein the interlayer insulating film includes a first interlayer insulating film and a second interlayer insulating film formed on the first interlayer insulating film, wherein the first resistance metal film and the third resistance metal film are formed on the first interlayer insulating film, wherein the second metal wiring layer is formed on the second interlayer insulating film, wherein the first resistor is formed by connecting the first resistance metal film and the first metal wiring layer through two lower metal plugs that only penetrate through the first interlayer insulating film such that the entire second resistance metal film is electrically insulated by only contacting with surrounding first dielectric materials, wherein the second resistor is formed by connecting the fourth resistance metal film and the second metal wiring layer through two upper metal plugs that only penetrate through the second interlayer insulating film such that the entire third resistance metal film is electrically insulated by only contacting with surrounding second dielectric materials, wherein the first resistance metal film and the third resistance metal film are made of a same material, and wherein the second resistance metal film and the fourth resistance metal film are made of a same material.