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Pin With Taper to Form Stand-Off and Slot for Solder Flow

IP.com Disclosure Number: IPCOM000047314D
Original Publication Date: 1983-Oct-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Brownell, HL: AUTHOR [+3]

Abstract

A pin for a circuit module has a taper that allows it to fit only part way through a hole in a circuit board so that the module stands off from the board. The pin has four flat surfaces that provide an additional space for solder to flow between the surface of the board and the surface of the pin. Fig. 1 shows a pin 1 with an upper surface 2 where the pin is joined to a pad on a circuit module, a cylindrical portion 3 and a tapering portion 4. The tapering portion has four flat surfaces 5. See Fig. 2 which is a section through line 22 in Fig. 1. Fig. 3 shows pins 1 attached to a circuit module 6 only at a few points to support the module away from a board 7. Conventional pins 8 at other locations provide electrical contact but do not provide a stand-off function.

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Pin With Taper to Form Stand-Off and Slot for Solder Flow

A pin for a circuit module has a taper that allows it to fit only part way through a hole in a circuit board so that the module stands off from the board. The pin has four flat surfaces that provide an additional space for solder to flow between the surface of the board and the surface of the pin. Fig. 1 shows a pin 1 with an upper surface 2 where the pin is joined to a pad on a circuit module, a cylindrical portion 3 and a tapering portion 4. The tapering portion has four flat surfaces 5. See Fig. 2 which is a section through line 22 in Fig. 1. Fig. 3 shows pins 1 attached to a circuit module 6 only at a few points to support the module away from a board 7. Conventional pins 8 at other locations provide electrical contact but do not provide a stand-off function. A space 9 exists between the board 7 and the tapering portion 4 of pin 1 and solder is flowed into this space during assembly. The flat surfaces 5 provide additional space for improved soldering.

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