a mARTIAN dIARY

In reference to chip testing

Yield loss is that fraction of good chips from  the total number of chips that are rejected as bad chips during testing

Defect Level is that fraction of bad chips that are passed during testing as good chips

This issue occurs because to create ideals tests or defect based tests  is very hard due to the complexity in modeling the real defects properly and also the inability to exhaustivily cover all real defects. Instead "fault models" like stuck at fault etc are develops which does not map on to real defects 100%

Hence some good chips are rejected and some bad chips are passed

Good chips   Prob of pass = high       Mostly good chips
                ———————>>
                *                 *
   Prob Of Fail *           * Prob of pass
        (Low)       *     *    (Low)
                         *
                       *   *
                     *        *     
                  *              *
                *                   *
 Bad Chips   —————–>>  Mostly Bad Chips
                      Prob Of Fail
                         High

retroactive continuity – usually applies to television and film, when they revise something that happened in the past, possibly Conflicting with previous material

An informal fallacy in which one arguer uses a logically irrelevant "attack" on another arguer as a reason to disregard the second arguer’s argument. It is a fallacy of relevance. there are three types, Abusive, circumstantial and tu quoque.

Something that has been done to me plenty of times and unknowingly done many times too

Added this logic book to my todo….let me see when this happens

From http://www.uky.edu/~rosdatte/phi120/lesson7a.htm

NRE – Non Recurring Cost In the electronics industry (or any industry for that matter), is the one time cost involved in developing a product. for example NRE’s are obviously higher for ASIC’s than FPGA’s. 

MOQ – Minimum Order Quantity The minimum quantity of a product that must be sold so that the project breaks even. When NRE is high MOQ also becomes high.