Patent ID: 11948797
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 3:
4. A method for manufacturing a semiconductor device comprising:
forming an insulating film on a semiconductor substrate;
applying a resist on the insulating film;
forming a first opening in the resist by exposure and development;
isotropically etching the insulating film using the resist at which the first opening is formed as a mask to form a second opening having a width wider than that of the first opening below the first opening;
performing baking to thermally shrink the resist to bend an eave portion of the resist upward so that a taper angle is in a range from 30° to 90°;
after the baking, forming a metal film on the resist and on the semiconductor substrate exposed at the second opening; and
removing the resist, the metal film on the resist, and the insulating film and leaving the metal film on the semiconductor substrate as an electrode.