To: Hepps who wrote (28181 ) 8/31/1999 11:15:00 AM From: wily Respond to of 93625
More on testers from the ebn Tate interview: Q: On the back end, we've heard some concern that the testing infrastructure is still not in place to people's satisfaction. A, because of the expense, but B, because of the fact that the likes of HP, Teradyne, Advantest, haven't come out with the ability to do single-pass testing... Can you address that issue? A: At this point, all of the tester companies, HP, Schlumberger, Advantest, and Teradyne have announced Rambus systems, and have shipped mass production systems. All of those four companies have testers that are completely capable of single-pass test right now, but nobody in their right mind would use them for single pass right now for economic reasons. The DRAM industry is very constrained on capital, so you want to make your capital work hard, as much as possible, and when you think about testing in Rambus DRAM, there's two things you've got to do. You've got to make sure the core is working okay. A long time ago, we designed a mode into the Rambus DRAM where you can test that using the low frequency testers. They have a lot of low frequency testers sitting around, they're not using them, so why not use those at the core, and only use these new expensive testers for testing the interface. So it's a two pass test. Arguably, if you were buying testers from scratch you'd buy the new testers exclusively, because they can test the core even faster and the cost to test will end up in the long term being the same or lower than SDRAM. If you're tight on capital, if you have to lay out new money, you'll want to get the most out of that, so this two-pass test is what most of our partners are going to do, initially.