Chip production testing is probably the most underestimated task by ASIC development engineers. And yet, testing is an essential step with a direct impact on final chip cost.
Let’s start with the basics. Testing of chips is necessary because the chip manufacturing process cannot provide 100% yield. Silicon foundries
Early on in Chip projects, yield is not taken very seriously. The common thinking goes – anyhow there isn’t much to do as this early point of time. However, there are actually several things you can do even before the Chip design starts, which will translate to clear savings.
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Semiconductor Assembly and Test Services are converting rapidly into a pure outsourcing mode of operation. While today perhaps only 50% of the market is using Outsourced Semiconductor Assembly and Test (OSAT, or SATS) this number is set to increase in the future.
While many of the low-end suppliers are
LoadBoard (LB) is a mandatory, custom made PCB, that acts as a mechanical and electrical interface between the tester (ATE) and the device under test (DUT). LoadBoard has well-defined physical dimensions and it must fit perfectly into the tester.
It is one piece of the entire ASIC Test Solution