Browse Prior Art Database

MULTIFUNCTIONAL SURFACE MOUNT TECHNOLOGY SUBSTRATE CARRIER (BICYCLE)

IP.com Disclosure Number: IPCOM000009731D
Original Publication Date: 2000-Jan-01
Included in the Prior Art Database: 2002-Sep-13
Document File: 2 page(s) / 97K

Publishing Venue

Motorola

Related People

David Laffler: AUTHOR [+4]

Abstract

A substrate carrier is described that is intended for use as a multifunctional multi-up array carrier to capture singulated ceramic chip devices via edge referencing for surface mount assembly processing.

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MULTIFUNCTIONAL SURFACE MOUNT TECHNOLOGY SUBSTRATE CARRIER (BICYCLE)

by David Laffler, Dan Balinski, Robert Evans and David Yound

  A substrate carrier is described that is intended for use as a multifunctional multi-up array carrier to capture singulated ceramic chip devices via edge referencing for surface mount assembly processing.

  Processes for the use of this type of carrier include at least screen/stencil printing, component placement, solder reflow, die attach, wire bonding, and ceramic ball grid array.

  Three distinct layers make up the structure of this carder. The base layer 1 provides the stability of the carders, especially for high temp applications such as reflow, epoxy cure, and Pick and Place. The center layer 2 comprises the retention and locking/unlocking mechanism, which positions and secures the substrate in their respective orientation. The detente (top) layer provides the location stops for the substrates.

  As a multiple process carrier and since it uses the strategy of standardized carrier size (X,Y dimen- sion), this carrier can be used in lieu of several dif- ferent types of carriers for the various manufactur- ing processes. This translates to reduced handling, system change over, and tooling costs.

  The mechanical attributes of this type of carder show that it has a low structural profile, at least for most applications less than 100 mil. This carrier design can capture substrates with very thin profiles,
e.g., as low as 25 mil. The key for this lower profile is the uniqueness of the design and manufacture of

the retention and cam locking/unlocking mecha- nism....