MicroBGA


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MicroBGA

A CSP BGA chip package from Tessera Inc., San Jose, CA (www.tessera.com). The µBGA architecture uses very fine pitch between the solder balls that enable the packaging to be barely larger than the chip itself. Tessera's unique design uses elastomer layers to withstand changes in temperature between the printed circuit board and the chip (CTE). See CSP, BGA and CTE.


µBGA Packages
Tessera's µBGA packaging allows for very small chip footprints on the printed circuit board as is obvious from this picture. (Image courtesy of Tessera Inc.)
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Since the microBGA package is more compact than other SMT devices, it has a shorter contact length from the device pin to the outside world.
Note: Tessera, Shellcase, MicroBGA, Compliant Chip, MicroZ and the Tessera logo are registered trademarks of Tessera, Inc.
It is appropriate for test and burn-in of CSP, MicroBGA, DSP, LGA, SRAM, DRAM and Flash devices.
The system can be used by PCB and semiconductor manufacturers to conduct real-time inspection of BGA, microBGA, flip chip, chip-on-board, bond wires and other applications needing precise measurement.
Note: Tessera, the Tessera logo, MicroBGA, MicroBGA-W, MicroBGA-F and MicroZ are registered trademarks of Tessera, Inc.
A high I/O microBGA, with a low standoff under standard aqueous (water only) cleaning techniques produced a product that left visual residues and ionic levels well above cleanliness limits for good electrical performance.
E[acute accent]Note: Tessera, MicroBGA, Compliant Chip, MicroZ and the Tessera logo are registered trademarks of Tessera, Inc.
Components assembled included four area array packages: one microBGA with 46 I/O chip scale package (CSP), one 48 I/O CSP, a flex-based 144 I/O and a laminate-based 64 I/O CSP.
Figure 5 shows the relative paste volume for a 20-mil pitch microBGA with 10-mil square apertures with 2.
Note: Tessera, MicroBGA, Compliant Chip and the Tessera logo are registered trademarks and MicroZ is a trademark of Tessera, Inc.
CSPs and microBGAs are area array devices that offer outstanding function and electrical performance.