Patent ID: 8377826

Claim:
A method for fabricating a saddle type fin, the method comprising: providing a substrate defining at least two active regions that have neighboring ends in a major axis; forming a first mask layer over the substrate including the active regions; forming a second mask layer over the first mask layer; patterning the second mask layer by using a first fin mask as an etching mask; patterning the first mask layer by using an etching mask that includes a second fin mask and the patterned second mask layer, the patterned first mask layer having openings configured to fowl saddle type fin regions of the active regions, the patterned first mask layer covering the rest of the active regions; and etching the saddle type fin regions by using an etching mask that includes the patterned first mask layer to form saddle type fins in a local damascene structure, wherein one of the first and second fin masks is configured to exposes the saddle type fin regions in a line pattern and the other of the first and second fin masks is configured to cover the neighboring ends of the active regions.