Browse Prior Art Database

Thermostatic Control of Contact Heating Thermode for Temperature Uniformity

IP.com Disclosure Number: IPCOM000037934D
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-31
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Chalco, P: AUTHOR [+3]

Abstract

The tooling disclosed uses a bimetallic or memory material (10) to insure uniform heating of each lead (12) on "J" leaded Surface Mounted components (14) being soldered to boards (20). Non-uniform heating usually occurs because the leads are not perfectly planar causing the thermode or hot bar not to contact all the leads thus producing a poor solder joint on those leads with poor thermode contact.

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Thermostatic Control of Contact Heating Thermode for Temperature Uniformity

The tooling disclosed uses a bimetallic or memory material (10) to insure uniform heating of each lead (12) on "J" leaded Surface Mounted components
(14) being soldered to boards (20). Non-uniform heating usually occurs because the leads are not perfectly planar causing the thermode or hot bar not to contact all the leads thus producing a poor solder joint on those leads with poor thermode contact.

A heater band (16) encircling the tool completely attaches to rows of finger- like contacts (10) that when heated move inward and firmly contact each individual lead. The contacts have spring characteristics thereby insuring a reliable heat transfer path to each lead. After solder reflow, the contact fingers cool and return to their initial non-gripping position thus permitting withdrawal of the tool without any resistance from the attached component.

(Image Omitted)

Disclosed anonymously.

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