Browse Prior Art Database

Air Actuated Socket for Plastic Leadless Chip Carrier Modules

IP.com Disclosure Number: IPCOM000060674D
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Guttler, JW: AUTHOR

Abstract

This article describes a modular zero insertion force air actuated socket used in automated testing of plastic leadless carrier (PLCC) modules.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 97% of the total text.

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Air Actuated Socket for Plastic Leadless Chip Carrier Modules

This article describes a modular zero insertion force air actuated socket used in automated testing of plastic leadless carrier (PLCC) modules.

The zero insertion force socket shown in the Figure (cross- section) may be used in place of existing PLCC sockets which are not zero insertion types or sockets which require special tools for removing the module from the socket. The assembly 10 is soldered to a printed circuit (PC) board 11 for connection to an automated tester (not shown).

Elements of the socket shown include a locator block 12 which supports the PLCC module 13 at the correct height and provides a mounting support 14 for a plurality of "V" notched socket contact pins 15. A pin actuator subassembly 16 is mounted on the locator block 12 and has an air chamber subassembly 17 attached to drive pressure actuated spring loaded plungers 18 each of which deflects respective contact pins 15 into respective module pins 19 to make physical and electrical contact. When the air pressure is removed, spring 20 restores each plunger 18 to its initial position and breaks contact between each control pin 15 and each respective module pin 19.

The "V" notch on each socket contact pin 15 (detail figure) provides the following function: 1)Locates the module pin 19 and thus prevents adjacent module pins from touching and shorting. 2) Provides two points of physical and electrical contact with each module pin throug...