Surface micromachining process of MEMS ink jet drop ejectors...

Semiconductor device manufacturing: process – Coating of substrate containing semiconductor region or of... – Multiple layers

Reexamination Certificate

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C438S393000, C029S025350

Reexamination Certificate

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08058182

ABSTRACT:
Method and device for forming a membrane includes providing a glass substrate, and depositing a thin layer of chromium on the glass substrate. The thin layer of chromium is patterned to form a deflection electrode and interconnect leads. A sacrificial layer of aluminum is deposited on top of the patterned chromium layer, then the sacrificial layer is patterned to define anchor regions. On top of the sacrificial layer, a thick layer of chromium is deposited, and the thick layer of chromium is patterned to form a membrane. The sacrificial layer is then etched to release the membrane.

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