Patent ID: 7645701

Claim:
A method of making an electronic structure, comprising: providing a semiconductor structure including a first layer of semiconductor material having first and second surfaces and a second layer of semiconductor material having first and second surfaces joined together by a first layer of insulating material and a second layer of insulating material with said first layer of insulating material interposed between said second layer of insulating material and said second surface of said first layer of semiconductor material and said second layer of insulating material interposed between said first layer of insulating material and said second surface of said second layer of semiconductor material; forming a via in said first layer of semiconductor material having a wall surface extending from the said first surface of said first layer of semiconductor material through said first layer of insulating material to said second layer of insulating material; forming a layer of insulating material on said wall surface of said via; filling said via with another material; etching said second layer of semiconductor material back to said second layer of insulating material; and etching said second layer of insulating material to expose said another material.