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To: Petz who wrote (4837)	3/9/1998 2:51:00 PM
From: Paul Engel	Read Replies (5) \| Respond to of 6843

Petz - Re" Rocket Lots" What I assume people mean by Rocket Lot is a wafer fab lot that has the highest priority at all times and at all process steps. The lot is tracked continuously and any process station immediately AHEAD of the current process station is HELD (no other lots are put through that station) until the Rocket Lot arrives, at which time it is immediately processed. Any engineering support required at a given station must be present before the lot arrives, and insure the lot is processed post-haste with whatever technical support (special processing, equipment settings, split-prameter-processing) may be required. This applies to the lot 24 hours a day, 7 days per week. This Priority - and advanced station hold with mandatory engineering support - is maintained throughout the entire process. Throughput time could be cut to two weeks or less, depending upon circumstances. By the way - I have received private e-mail that indicates AMD's Fab 25 0.25 micron lots are achieving 80% yields on some lots - over 250 die per wafer. Wafer starts, however, haven't reached 1000 starts per week. These are speed binning at a minimum of 300 Mhz with some topping out at 366 MHz. AMD fixed some layout problems on their mask set, at least that is what my source thinks - how about yours? Looks like we got ourselves a "plant" in the plant! Paul

To: Petz who wrote (4837)	3/9/1998 9:09:00 PM
From: Yousef	Read Replies (1) \| Respond to of 6843

John, Re: "By the way, Paul, please explain the process for "rocket lots." Petz, here is a my post over on the Cyrix thread answering the same question about a week ago --> Message 3569386 "Dave, Re: "Yousef: What is a rocket lot, anyways?" There are basically two priorities given to wafer lots in the Fab above normal production status ... 1) Rocket Lot - equipment is held open so that this lot never waits for equipment to free up. This lot is continuously tracked by production and communication to upcoming process steps is critical to insure this run never sits ... 2) Priority Lot - this lot always goes to the front of the line for equipment, but equipment is not held open in advance of the lot. This lot will sit some waiting for the equipment to finish a lot in process. A Rocket lot should go through the Fab in about 1/3 the time of normal production ... while a Priority lot should go through in about 1/2 the time. Thus Rocket and Priority lots are used to verify new designs or important process changes/improvements. Hope this helps." Make It So, Yousef