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Week 21 Report

 

Inspection Accept

74%

 

Electrical Testing Pass

73%

This Week in The Lab...
Week 21 Summary
Substandard Part Listing

                                   
White Horse Laboratories' Quality Report

Week 21 Summary                                                                        

 

Inspection yields logged a second straight week of significant improvement and Electrical Testing yields once again stayed steady.

 

Testing yields recorded a third straight week of 73% of lot yields of over 95% and have stayed within the 70-75% for the past two months.

 

Inspection yields posted a 14-point improvement in Week 20 and followed with another 12-point gain in Week 21 to reach 74%.

 

There were six part numbers with electrical failure rates of over 5% on the list this week, one of which had a 100% failure rate.

Holiday Announcement - Dragon Boat Festival (Monday, June 2)

Dragon Boats

The festival commemorates the death of the poet and minister Qu Yuan of the ancient state of Chu during the Warring States period of the Zhou Dynasty. The Chu king made an alliance with the powerful state of Qin, to which Qu was great opposed as he felt the Qin were not to be trusted in their thirst to dominate all of China. For this Qu was banished, and even accused of treason.

 

Twenty-eight years later, Qin captured Ying, the Chu capital. In despair, Qu Yuan committed suicide by drowning himself in the Miluo River.

 

It is said that people raced out in their boats to save him, and this is said to have been the origin of dragon boat races. The dragon boat races are now held around the globe, and particularly in China, Hong Kong, and countries with a strong Chinese community.

 

When Qu's body could not be found, balls of sticky rice were dropped into the river so that the fish would eat them instead of Qu Yuan's body. This is said to be the origin of zongzi (sticky rice wrapped in banana leaf).

 

White Horse's Hong Kong and China operations will be closed on Monday, June 2nd, and will resume standard operations on Tuesday, June 3.


Week 21 Quality Report

  

Substandard Part Listing

 

NEC UPD70325L-10 (Date Code not marked or labeled) - 26% Failure Rate - Open pins and broken protective diodes.

 

Altera Corporation EP2C8F256C8N (Multiple date codes) - 6% Failure Rate - Program error and no output.

 

Vishay  SM8S30A-E3/2D (Date Codes 1312, 1324, 1325 and 1326) - 100% Failure Rate - Low Vbr and high Id.

 

National semiconductors LM199AH/883 (Date Code 0512) - 12% Failure Rate - High Vbr.

 

International Rectifier IR2235SPBF (Date Code not marked or labeled) - 8% Failure Rate - Low output response. 

 

ST Microelectronics GS-R405/2 (Date Code not marked or labeled) - 81% Failure RateLow output voltage.

Vishay SM8S30A-E3/2D - 100% failure for low Vbr
Notes:

1. Statistics are calculated as a percentage of all lots dis-positioned within the given time period.

2. "Accept" is defined as customer acceptance of report device condition.

3. "Pass" is defined as meeting electrical parameters defined by the agreed upon test plan.

We hope you find this report informative and usefull for your organization.

 

All the best,

Mark A. Rinehart
White Horse Laboratories