Test Houses, whether in Asia or on-shore in the USA or Europe, typically have used desk-top tools including Excel for analysing data such as STDF data and other datalog formats. If using Excel, the test house may have developed their own scripts for converting from STDF to CSV, then importing the CSV files into Excel.

The advantage of desk top tools is that they can be fast. That is, once you have the data downloaded to your desktop. They can allow analysis of a few hundred tests and provide standard reports which are useful to send to colleagues and customers.  The main problem is that this is not a scalable approach. You are limited by RAM (typically 2GB) and disk-space to a few datalogs at a time and, with the volumes of units now in the millions going through test every day, it’s no longer enough.

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Test floors in Asia are just realising the power that the alternative server-powered approach can have in terms of collaboration and scalability of their data analysis capabilities. With server-powered analysis, engineers use any device with a browser to analyse huge amounts of data quickly, often with >100GB of RAM at their fingertips.

A server-powered approach enables the following:

  • Analysis of massive volumes of data at the same time
  • On-line collaboration with remote teams and customers
  • Centralised parsing scripts (easier to maintain than having software on desktops)
  • Real time reports and analysis
  • Analysis of datalogs with thousands of tests (highly complex products can be supported)
  • Analysis of thousands of datalogs that each have thousands of tests
  • Daily reports highlighting the problem products, testers, lots, wafers and test platforms
  • Automated analysis of UPH

The result is a test house which is:

  • fully aware of yield and throughput problems
  • fast acting to resolve these problems, armed with the relevant information
  • able to efficiently support the most complex of products
  • able to support the extreme volume nature of automotive, IOT and smartphone chips
  • closer that ever to their customers, being now on top of issues of concern to their customer

One of our test house customers in Taiwan uploads tens of gigabytes of data every day to the server. yieldHUB engineers are on the ground in Taiwan helping these test houses, training their engineers to extract the maximum value from our software.  Moreover, osatHUB resides on the server, crunching hundreds of gigabytes per week of data, issuing reports and alerts to teams of engineers so that they can keep on top of production as volumes inexorably grow.