Patent ID: 6372652
Filing Date: 2002-04-16
Classification: H01L

Abstract:
A method for forming a thin film, blowable fuse, comprising the steps of:a. forming a fuse element over a semiconductor structure, said fuse element having a narrow portion with an element width and tapered portions on either end of said narrow portion; b. forming a fuse dielectric layer on said fuse element; c. forming on said fuse dielectric layer a patterned first metal interconnect layer comprising a sacrificial metal patch, having a patch width, said patch width being greater than said fuse element width; d. forming a second dielectric layer on said sacrificial metal patch; e. patterning said second dielectric layer to form a fuse window, having a window width, using a first fuse window etch selective to said sacrificial metal patch; said window width being greater than said patch width; said fuse window terminating over said narrow portion of said fuse element; and f. etching said sacrificial metal patch through said fuse window using a second fuse window etch selective to said fuse dielectric layer.