Thursday, June 3, 2010

Ball-Grid Array Solutions Can Form the Mainstream for PCB Designs

Ball Grid Array Solutions or BGA solutions have been very popular because of its ability to meet the product design challenges. They are compatible for many OEMs that demand small and assorted packaging options which are as well cost competitive. They form a very ideal solution as the I/O connections are well inside the device thereby improving the proportion of PCB area and the pin count.
Given below are the several advantages which the BGA Solutions provide, for the PCB designs.
• Advantages of integrated circuit speed
• Decrease in damaged leads
• Excellent heat dissipation
• Smaller footprint
• increased leads per unit area
• Does not require expensive surface mount equipment


Apart from the various advantages BGA offers, there are also certain challenges that have to be faced. When the BGA with increasing pins are used, then the problem of routing the signals arises. BGA partitioning should always be designed precisely on a PCB so as to minimize or completely eliminate the noise and the crosstalk and the manufacturing issues as well.
Perfect BGA partitioning takes the homogeny of the partitions as priority. Such uniformity ensures the even distribution of power and the ground pins, on all the four quadrants, to the extent possible. Fan outs have also to be evenly distributed all through the BGA periphery so that even routing is created across the PCB, as well.
Decoupling capacitors can be placed close to the BGA pads so as to reduce the noise at source. Memory signals have to be specially considered in the BGA partitioning. Ground planes have to be clean and placed closer to the components generating noise.

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