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Dimensional Verification Tooling for Personal Computer Memory Card International Association Assemblies

IP.com Disclosure Number: IPCOM000116845D
Original Publication Date: 1995-Nov-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Jones, MJ: AUTHOR [+5]

Abstract

The Personal Memory Card International Association (PCMCIA) is the latest marketing surge in the Printed Circuit Board (PCB) Assembly industry. PCMCIA cards are about the size and thickness of a credit card. They are currently being used in a variety of notebook, laptop and desktop computers.

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This is the abbreviated version, containing approximately 62% of the total text.

Dimensional Verification Tooling for Personal Computer Memory Card
International Association Assemblies

      The Personal Memory Card International Association (PCMCIA) is
the latest marketing surge in the Printed Circuit Board (PCB)
Assembly industry.  PCMCIA cards are about the size and thickness of
a credit card.  They are currently being used in a variety of
notebook, laptop and desktop computers.

      One of the many critical aspects required to successfully
manufacture these PCMCIA cards is dimensional accuracy.  The final
product package dimensional specifications are included in the PCMCIA
Standard 2.01.  This standard establishes a rigid criteria for
package width and height.  The current specification for the package
width is 0.002".

      A majority of PCMCIA PCB manufacturers utilize calipers and/or
drop gauges to determine the dimensional accuracy of their
assemblies.  Both of these methods are tedious to perform and produce
results with questionable accuracy.  A tool set has been developed to
perform accurate PCMCIA package dimensional verification
measurements.

      The first device, shown in Fig. 1, was developed to measure the
width of the PCMCIA assembly.  The card is inserted in Side A and
moved under the dimensional verification device (digitmatic height
gauge).  The probe on the digital height gauge indexes over the
PCMCIA cards edge profile.  As the probe indexes, its relative
displacement is read by the measure device. ...