Patent ID: 8003534
Filing Date: 2011-08-23
Classification: B81C

Abstract:
1. A method for forming a semiconductor device holder on a wafer, comprising: etching a first pattern to a first depth into a top of the wafer, wherein the first pattern comprises a semiconductor device, a bar extending in a first direction, a first sidewall extending in a second direction orthogonal to the first direction, and a first tab extending parallel to the first direction, wherein the semiconductor device is connected to the bar through a series of the first tab and the first sidewall, and the first depth equals the thickness of the first tab; and etching a second pattern to a second depth into a bottom of the wafer, wherein the second pattern comprises the semiconductor device, the bar, the first sidewall, and the second sidewall but does not include the first tab, wherein the first sidewall extends from a first end thereof connected only to the bar to a second end thereof connected to the first tab and not connected to any similar bar, the second depth equals the thickness of the wafer minus the thickness of the first tab, and the first depth is less than the second depth.