- Address: 679 Worcester Road,
Natick MA 01760
- Email: firstname.lastname@example.org
- Website: www.vdcresearch.com
- Main: 508.653.9000
In the last week’s blog we looked at the semiconductor manufacturing process and the various testing steps that happen as raw silicon is turned into finished devices. In this week's follow up we continue looking at the testing process on the product manufacturing side. Last week we noted that Quanta was manufacturing notebook computers. Because of this, I want to make two observations about the product designs and manufacturing process for notebook computers.
Now, we will look at a few key testing steps on the product manufacturing side.
1.) Incoming Test: This process is considered as being redundant to supplier testing before shipment. Product manufacturers used to commonly test incoming components but, due to cost reduction pressures, that practice is now very uncommon outside the Mil/Aero market. Although it is not likely relevant to the Quanta vs. AMD/ATI case, counterfeiting and other supply chain related cases where lesser specification devices are re-labeled make incoming test more relevant again even in consumer type product manufacture.
2.) Circuit Board/Module Test: The fully assembled circuit board or module is tested before it is embedded in the final product. Thermal transfer issues can be identified by the use of infrared, optical, and or sensors. Repairs are expensive for problems found here but, it is still far less costly than having the product failing downstream.
3.) Highly Accelerated Life Testing (HALT): This is one last type of testing process that might have mitigated AMD and Quanta’s issue at either the packaged device, module/circuit board or completely assembled product stage. The unit being tested is put through extreme levels of hot and cold cycles while also experiencing other stresses such as vibration and g-forces. In this way, a myriad of potential production issues can be detected before the product ends up in customer hands and/or is in a mission critical role that embedded computers are frequently placed in.
In closing, HALT testing is an almost de-facto step in Military products let alone ones that might be launched into space. In Quanta’s case, you would never do this with all of the units but certainly at least a sample of them. If Quanta did not do this, the brand owner should have. It does seem like a mystery to me about why this case is happening. It should be interesting to find out where the process became broken or which steps were skipped. If something interesting does come to light in the future we will surely revisit this case.