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Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
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This article describes a brazing boat that is capable of producing stress-free,
hermetically sealed substrate frame assemblies.
Referring to the figure, frame clamping assembly 1 is incorporated to hold the
frame 2 flat during the brazing cycle. It is important that this assembly be made
of a material with the same coefficient of thermal expansion as the frame, that
the frame 2 be independently clamped flat, and that it be free to float with the
A frame preloading spring assembly 3 is utilized to preload the frame 2
against the substrate 4 with uniform pressure, producing a uniform braze joint.
The spring material is molybdenum, which has excellent high temperature
The substrate 4 is located by a graphite window 5 of a suitable size to
The pin carrier 6, which holds the I/O pins 7 during the brazing operation, is
also made of graphite. The grade of graphite used is specifically chosen to
match the coefficient of thermal expansion of the substrate used.
The assembly is kept in alignment by locator pins 8 and held together by
screws and nut plates 9. Subsequent to assembly, this boat is placed on the
conveyor of a continuous-belted controlled-atmosphere furnace.
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