Can people provide information on what is meant by Compression efficiency in DFT?

[sathishkas]

Hi,

Can people provide information on what is meant by Compression efficiency in DFT?
What is ideally a good compression efficiency and its impact?
How to achieve a good compression efficiency and what factors govern it? Please consider all kinds of compression architectures when you reply

Thanks,
Sathish

 

[maulin sheth]

I think it is totally depends on the design..Compression ratio is mostly design dependent and what to achieve...We use Compression because of less test pins available and also due to less ATE memory...So to decide the ratio..we need to think in all perspective...there is not any specific thumb rule for the compression factor..

 

[rca]

The compression algo is tool dependant, and mainly your choice is dependant of the tools policy of your company, Synopsys/Cadence/Mentor/others?
As indicate by maulin sheth, the compression capability is related to your design, and the goal is reduce the memory usage with the same coverage target which also depend of your ATE capacity and coverage quality rule of your company.