Browse Prior Art Database

Flex Alignment Tool

IP.com Disclosure Number: IPCOM000101224D
Original Publication Date: 1990-Jul-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Hernandez, B: AUTHOR [+4]

Abstract

As more and more computer packaging consists of surface-mounted components it is quite imperative to locate these parts very accurately. Lead spacing is forever shrinking and components using flex connections are commonplace in board populations. To accommodate these delicate components it is necessary to "find" these flexible interconnects with a sophisticated vision system or by placing them on a very precise nest. The described tool will pick up a previously excised flex connection using a retractable vacuum and tapered pin mechanism and transport the flex to a nest having holes that will allow the tapered pins to accurately locate the flex with a carrier.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 96% of the total text.

Flex Alignment Tool

       As more and more computer packaging consists of
surface-mounted components it is quite imperative to locate these
parts very accurately.  Lead spacing is forever shrinking and
components using flex connections are commonplace in board
populations.  To accommodate these delicate components it is
necessary to "find" these flexible interconnects with a sophisticated
vision system or by placing them on a very precise nest.  The
described tool will pick up a previously excised flex connection
using a retractable vacuum and tapered pin mechanism and transport
the flex to a nest having holes that will allow the tapered pins to
accurately locate the flex with a carrier.

      The drawing shows a cross section of the alignment tool.  The
key elements of this tool are the spring loaded location pins and
vacuum tubes.  The tapered pins will engage mating holes in the flex
prior to the vacuum being applied through the vacuum tubes.  When it
is ascertained that the pins are engaged, the vacuum is applied and
the tool with the flex held in place is transported to the carrier
nest.  The pins protruding through the flex will then meet the holes
in the nest and additional pressure is applied to assure correct
seating of the locating pins.  The spring loading of the vacuum tubes
and location pins will allow this controlled additional pressure.
When the pins are seated sufficiently, the vacuum is then switched
simultaneously from the alignment tool...