Browse Prior Art Database

Circuit Chip Placement Mechanism

IP.com Disclosure Number: IPCOM000113371D
Original Publication Date: 1994-Aug-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Mayr, W: AUTHOR [+4]

Abstract

Described is a hardware implementation of a circuit chip placement mechanism for use with robotic end of arm tooling. The mechanism provides a highly accurate means for the placement and removal of silicon circuit chips from Flip Chip Sockets (FCSs) during chip fabrication. The mechanism, called a floating tip chip - Pick/Place Head (PPH), is designed to eliminate the need for optics and xy table systems.

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Circuit Chip Placement Mechanism

      Described is a hardware implementation of a circuit chip
placement mechanism for use with robotic end of arm tooling.  The
mechanism provides a highly accurate means for the placement and
removal of silicon circuit chips from Flip Chip Sockets (FCSs) during
chip fabrication.  The mechanism, called a floating tip chip -
Pick/Place Head (PPH), is designed to eliminate the need for optics
and xy table systems.

      In prior art, the placement of circuit chips into a FCS die was
time consuming and required the use of optical devices and xy
positioning tables.  The concept described herein provides a
mechanism that is highly accurate in the placement of silicon chips
in a FCS, without requiring the time consuming efforts of optics and
xy tables.

      The PPH is shown as follows:  Fig. 1a shows a front view,  Fig.
1b shows an isometric view and Fig. 1c shows a bottom view.  Fig. 2a
shows a front view cut-away section and Fig. 2b shows the isometric
view of the cut-away section.

      The PPH mechanism consists of housing 10, as shown in Figs. 1a
and 2a, hollow non-rotating shaft 11 (Fig. 2a), piston 12, two
cylinders 13 and locator block 14.  In actual operation, housing 10,
shaft 11 and piston 12 form a precision spring return vacuum operated
cylinder.  Shaft 11 is used for picking and depositing chips by the
application of vacuum and air through hollow non-rotating shaft 11.
Cylinders 13 are used to secure locator block 14 in a fixed position
and cen...