Patent ID: 6627814
Filing Date: 2003-09-30
Classification: B81B,B81C,H01L,Y02P,Y10T

Abstract:
A method for manufacturing a cover assembly that can be welded to a micro-device package base to form a hermetically sealed micro-device package, the cover assembly including a transparent window portion and a weldable frame, the method comprising the following steps:providing a weldable frame having a continuous sidewall defining a frame aperture therethrough, the sidewall including a frame seal-ring area circumscribing the frame aperture, the frame seal-ring area having a metallic surface; providing a sheet of a transparent material having a window portion defined thereupon, the window portion having finished top and bottom surfaces; preparing a sheet seal-ring area on the sheet, the sheet seal-ring area circumscribing the window portion; metallizing the prepared sheet seal-ring area of the sheet; positioning the frame against the sheet such that at least a portion of the frame seal-ring area and at least a portion of the sheet seal-ring area contact one another along a continuous junction region that circumscribes the window portion; and heating the junction region until a metal-to-metal joint is formed between the frame and sheet all along the junction region, whereby a hermetic seal circumscribing the window portion is formed.