Claims
- 1. An apparatus for aligning and bonding balls to bonding sites on a substrate comprising:a ball retaining member comprising a plurality of ball retaining cavities configured to center and to retain the balls on the bonding sites; and an alignment member on the ball retaining member configured to align the substrate on the ball retaining member with the bonding sites in physical contact with the balls.
- 2. The apparatus of claim 1 wherein the ball retaining member comprises a material selected from the group consisting of silicon, ceramic, gallium arsenide, and glass.
- 3. The apparatus of claim 1 wherein the alignment member comprises a material selected from the group consisting of silicon, ceramic, gallium arsenide, and glass.
- 4. The apparatus of claim 1 wherein the alignment member comprises a polymer deposited on the ball retaining member.
- 5. An apparatus for aligning and bonding balls to bonding sites on a substrate comprising:a ball retaining plate comprising a plurality of ball retaining cavities and a plurality of vacuum conduits in flow communication with the cavities, each ball retaining cavity comprising a pocket with sloped sidewalls configured to center and to retain a ball; and an alignment member on the ball retaining plate comprising an alignment opening configured to align the substrate on the ball retaining plate such that the balls retained in the ball retaining cavities align with the bonding sites on the substrate.
- 6. The apparatus of claim 5 wherein the ball retaining plate and the alignment member both comprise silicon .
- 7. The apparatus of claim 5 wherein the alignment member comprises a separate element attached to the ball retaining plate.
- 8. The apparatus of claim 5 wherein the alignment member comprises a polymer.
- 9. An apparatus for aligning and bonding balls to bonding sites on a substrate comprising:a ball retaining plate having a plurality of ball retaining cavities therein, and a plurality of vacuum conduits in flow communication with the ball retaining cavities; and an alignment member on the ball retaining plate comprising at least one alignment opening configured to engage a peripheral edge of the substrate to align the substrate on the ball retaining plate with the bonding sites in physical contact with the balls.
- 10. The apparatus of claim 9 wherein the alignment member comprises a plurality of alignment openings configured to align a plurality of substrates.
- 11. The apparatus of claim 9 wherein the alignment opening has a peripheral outline corresponding to the peripheral edge of the substrate.
- 12. An apparatus for aligning and bonding balls to bonding sites on a substrate comprising:a ball retaining plate comprising a plurality of ball retaining cavities, and a plurality of vacuum conduits in flow communication with the ball retaining cavities; and an alignment member comprising a polymer deposited on the ball retaining plate having an alignment opening configured to engage a peripheral edge of the substrate to align the substrate on the ball retaining plate with the balls and the bonding sites in physical contact.
- 13. The apparatus of claim 12 wherein the polymer comprises a resist.
- 14. An apparatus for aligning and bonding balls to bonding sites on a substrate comprising:a ball retaining plate comprising a plurality of ball retaining cavities, and a plurality of vacuum conduits in flow communication with the cavities, each ball retaining cavity comprising a pocket in the ball retaining plate having sloped sidewalls configured to engage and center a ball on a bonding site, each vacuum conduit comprising an opening in the ball retaining plate configured for flow communication with a vacuum source; and an alignment member attached to the ball retaining plate having an alignment opening therein with an outline corresponding to a peripheral edge of the substrate configured to engage the peripheral edge and to align the balls on the ball retaining plate with the bonding sites on the substrate.
- 15. The apparatus of claim 14 wherein the substrate comprises an element selected from the group consisting of semiconductor wafers, semiconductor dice, semiconductor packages, and ball grid array substrates.
- 16. The apparatus of claim 14 wherein the alignment opening has sloped sidewalls.
- 17. The apparatus of claim 14 wherein the ball retaining plate and the alignment member both comprise silicon.
- 18. The apparatus of claim 14 wherein the ball retaining plate comprises a material selected from the group consisting of silicon, ceramic, gallium arsenide, and glass.
- 19. The apparatus of claim 14 wherein the alignment member comprises a material selected from the group consisting of silicon, ceramic, gallium arsenide, and glass.
- 20. The apparatus of claim 14 wherein the ball retaining plate comprises silicon and the substrate alignment member comprises a polymer.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a division of application Ser. No. 09/143,631, filed on Aug. 28, 1998, now U.S. Pat. No. 6,100,175.
US Referenced Citations (40)
Non-Patent Literature Citations (1)
Entry |
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