Patent ID: 6071819
Filing Date: 2000-06-06
Classification: B81B,B81C,H01L

Abstract:
A method of manufacturing a flexible microelectronic device comprising:first etching a lower side of a wafer using a first caustic agent;depositing a first layer of aluminum on an upper side of the wafer;patterning the first layer of aluminum;depositing a first layer of polyimide on the upper side of the wafer, covering the first layer of aluminum;depositing a second layer of aluminum on the upper side of the wafer, covering the first layer of polyimide;depositing a second layer of polyimide on the upper side of the wafer, covering the second layer of aluminum;depositing a third layer of aluminum on the lower side of the wafer;patterning the third layer of aluminum;second etching the lower side of the wafer using the third layer of aluminum as a mask and the first layer of aluminum as an etch stop and using a less caustic agent than said first caustic agent, such that the wafer is divided into islands with gaps surrounding each island; anddepositing a third layer of polyimide on the lower side of the wafer, such that the gaps are at least partially filled.