Browse Prior Art Database

Microcircuit Having Pinned Terminals

IP.com Disclosure Number: IPCOM000093915D
Original Publication Date: 1966-Apr-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 71K

Publishing Venue

IBM

Related People

Cochran, TJ: AUTHOR [+4]

Abstract

This microcircuit has flat leads for connection to a planar printed circuit card. These leads are riveted to a ceramic substrate to provide a strong, flexible mechanical and electrical connection.

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Microcircuit Having Pinned Terminals

This microcircuit has flat leads for connection to a planar printed circuit card. These leads are riveted to a ceramic substrate to provide a strong, flexible mechanical and electrical connection.

The ceramic substrate is processed to provide electrical circuit patterns. One typical process is to silk screen deposit conductive paste and resistor paste as required and fire the layers.

In A, metal clip member 20 is adapted to be attached to ceramic substrate
22. Member 20 has a series of terminals 24 and openings 26. Substrate 22 includes openings 28 which are aligned with openings 26. In B, terminal members or pins 30 are mechanically staked in the ceramic member by coining end portion 32 extending through the substrate hole and upsetting portion 34 extending above the substrate. Terminal 30 is trimmed above the portion 34. The clip is held to the substrate by the mechanically staked pins. In C, the clip is trimmed to remove all metal except the terminal members which extend from each pin in a planar array. The microcircuit is completely solder dipped to establish a good electrical connection between the printed circuit lands and the terminals and also to provide improved mechanical joint strength between the pin and clip.

In D, preformed sidewall 42 is attached to the substrate surface on which the flat terminals are located. Ridge 42 serves to hold the terminals in place. Viscous coating 44 can be applied in the area bounded...