Low cost window production for hermetically sealed optical...

Details Low cost window production for hermetically sealed optical... Low cost window production for hermetically sealed optical...

2006-09-29

2011-10-25

Bryant, David (Department: 3726)

Metal working

Method of mechanical manufacture

Obtaining plural product pieces from unitary workpiece

C438S116000, C359S514000

Reexamination Certificate

active

08042248

ABSTRACT:
Disclosed embodiments demonstrate batch processing methods for producing optical windows for micro-devices. The windows protect the active elements of the micro-device from contaminants, while allowing light to pass into and out of the hermetically sealed micro-device package. Windows may be batch produced, reducing the cost of production, by fusing multiple metal frames to a single sheet of glass. In order to allow windows to be welded atop packages, disclosed embodiments keep a lip of metal without any glass after the metal frames are fused to the sheet of glass. Several techniques may accomplish this goal, including grinding grooves in the glass to provide a gap that prevents fusion of the glass to the metal frames along the outside edges in order to form a lip. The disclosed batch processing techniques may allow for more efficient window production, taking advantage of the economy of scale.

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