PATENT COVER GRAPHIC


United States Patent 3,457,639
July 29, 1969

Method For Alignment Of Microcircuit Devices On Substrate
Charles W. Weller

Filed February 16, 1967
Image of US PATENT 3,457,639

Abstract of the Disclosure

In placing microminiature circuit elements such as beam lead transistors on a substrate, accurate alignment with the corresponding conducting paths on the substrate is assured by covering the substrate surface with a photoresist, removing the photoresist by a photographic process in those areas in which the circuit elements are to be placed and bonded, and placing elements in the photoresist depressions formed thereby.
Figure descriptions: cover graphic

  • Figure 1 is a sketch of misaligned microminiature circuit elements on a supporting substrate.
  • Figure 2 is a sketch of properly aligned microminiature circuit elements on a supporting substrate.

 Citations [54]:
  
2,805,968 09/1957 Dunn 3,290,756 12/1966 Dreyer 1,027,550 04/1966 Great Britain
National Museum of American History
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