Patent ID: 7923198

Claim:
A method of manufacturing a T-shaped electrode, comprising: forming a laminated resist which comprises at least: a photoresist first layer as an uppermost layer, a second layer as a lowermost layer, and a third layer as a layer immediately above the second layer; forming an uppermost layer opening by irradiating the laminated resist with light to pattern only the photoresist first layer and form the uppermost layer opening; reducing the diameter of the uppermost layer opening formed in the photoresist first layer by coating a resist pattern thickening material on the photoresist first layer; forming a lowermost layer opening in the second layer of the laminated resist by transferring the uppermost layer opening formed in the photoresist first layer to the third layer and the second layer below the photoresist first layer, penetrating the laminated resist to form a lower electrode opening in the second layer and the third layer; after forming the lowermost layer opening, heating the laminated resist to make the lowermost layer opening into a taper structure; side-etching the third layer immediately above the second layer; after side-etching the third layer immediately above the second layer, reducing the size of the lowermost opening which is the taper structure in the lowermost layer of the laminated resist; and forming a T-shaped electrode in the lower electrode opening formed through the laminated resist.