Browse Prior Art Database

Pick and Place Locator for TAB

IP.com Disclosure Number: IPCOM000113966D
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 102K

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 TAB components are becoming commonplace in board populations. To accommodate these delicate components it is necessary to "find" these TAB frames with a sophisticated vision system or by placing them on a very precise nest. It has been with tapered pins in this nest that the precise location has been met by inserting these pins in mating holes in the tape. TAB technology has evolved so that with ever increasing lead count the locating holes are taking up valuable real estate. This invention uses retractable pins external of the lead area to precisely locate the TAB frame for attaching to a computer board by a dead reckoning approach.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 65% of the total text.

Pick and Place Locator for TAB

      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 TAB components are
becoming commonplace in board populations.  To accommodate these
delicate components it is necessary to "find" these TAB frames with a
sophisticated vision system or by placing them on a very precise
nest.  It has been with tapered pins in this nest that the precise
location has been met by inserting these pins in mating holes in the
tape.  TAB technology has evolved so that with ever increasing lead
count the locating holes are taking up valuable real estate.  This
invention uses retractable pins external of the lead area to
precisely locate the TAB frame for attaching to a computer board by a
dead reckoning approach.

      The Figure is a top view of this invention.  The four holes
that are closest to the corners contain the retractable pins that in
this Figure are fully retracted.  The holes adjacent to the pins are
vacuum holes and are connected to the pipe that extends from the
right side of the fixture.  The serrated fitting in the front or on
the opposite side from the vacuum pipe supplies compressed gas to
raise the locating pins in the corners.  The sequence of operation
would be to place a formed TAB on the surface of the locator.  The
valve that controls the tapered locating pins would be activated and
the pins would...