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Characterization Of Micro-Bumps For 3DIC Wafer Acceptance Tests


The strong market needs to embed multiple functionalities from different semiconductor processing technologies into a single system continue to drive demands for more advanced 3DIC packaging technologies. Dimensions of copper pillar micro-bumps are consistently reduced in every new technology node to facilitate the 3D stacking of multiple dies so that overall system performance can be improved.... » read more

Advanced mm-Wave And Terahertz Measurements With Cascade Probe Stations


The strong market needs to embed multiple functionalities from different semiconductor processing technologies into a single system continue to drive demands for more advanced 3DIC packaging technologies. Dimensions of copper pillar micro-bumps are consistently reduced in every new technology node to facilitate the 3D stacking of multiple dies so that overall system performance can be improved.... » read more

Testing More To Boost Profits


Not all chips measure up to spec, but as more data becomes available and the cost of these devices continues to rise, there is increasing momentum to salvage and re-purpose chips for other applications and markets. Performance-based binning is as old as color-banded resistors, but the practice is spreading — even for the most advanced nodes and packages. Over the last three decades, engine... » read more

What’s WAT? An Overview Of WAT/PCM Data


Wafer acceptance testing (WAT) also known as process control monitoring (PCM) data is data generated by the fab at the end of manufacturing and generally made available to the fabless customer for every wafer. The data will typically have between forty and one hundred tests, each test having a result for each site (or “drop-in”) on the wafer. The sites are located so that the fab can monito... » read more

What’s WAT? Testing At The End Of Manufacturing


The high costs of building, resourcing and operating a foundry fabricating integrated circuits are well known. Fabless companies avoid this capital cost and focus on design and innovation in their area of expertise. On the other hand, the fabless company relies on the expertise and skills of the foundry to produce quality wafers. Many times a process used by a fabless company to manufacture... » read more