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Support System for Double-Sided Surface-Mounted Technology Assembly

IP.com Disclosure Number: IPCOM000062373D
Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Hebert, TM: AUTHOR [+2]

Abstract

A method is described which provides an inexpensive method of creating individualized support plates for producing double-sided surface- mounted technology (SMT) panels. The method employs an array of movable magnetic support blocks positioned on an alloy iron plate in a pattern to fit around the locations of components mounted on the bottom side of a panel. To assemble double-sided panels, the assembly tooling or fixture must be able to support a panel with components attached to the bottom surface. The solder paste printing and the component placement steps of the SMT assembly process require support, from the bottom side, to prevent deflection of the printed circuit panel. For single-sided SMT products, providing the bottom side support is simple and straightforward, a flat plate or platen is sufficient to support the panel.

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Support System for Double-Sided Surface-Mounted Technology Assembly

A method is described which provides an inexpensive method of creating individualized support plates for producing double-sided surface- mounted technology (SMT) panels. The method employs an array of movable magnetic support blocks positioned on an alloy iron plate in a pattern to fit around the locations of components mounted on the bottom side of a panel. To assemble double-sided panels, the assembly tooling or fixture must be able to support a panel with components attached to the bottom surface. The solder paste printing and the component placement steps of the SMT assembly process require support, from the bottom side, to prevent deflection of the printed circuit panel. For single-sided SMT products, providing the bottom side support is simple and straightforward, a flat plate or platen is sufficient to support the panel. However, for circuit panels with components mounted on both the top and bottom surfaces, the support fixture becomes more complex and expensive. An obvious solution is to machine cavities or pockets in the support plates to provide clearance for the components on the bottom side while the top sides are being assembled. The machined support plate is a very expensive solution because each product type or variation of component position would require the machining of new sets of plates. It also requires that the customized support plates be stored and inventoried. A second co...