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Message ID: 729     Entry time: Tue Jul 7 13:54:37 2026
Author: Xuesi Ma 
Type: Infrastructure 
Category: Cleanroom 
Subject:  

[Shane, Joshua, Cece, Ma, Mary, Abhi, Jacob]

The clean room (1119) was re-cleaned on Thursday (7/2). All surfaces were wiped down, the floor was vacuumed and mopped, and new sticky mats were installed. Additionally, a particle count measurement was performed on Monday (7/6) after allowing sufficient time for dust to settle. As this is the first particle count conducted after the clean room modification, the updated clean room zone configuration is attached for reference.

Particle Count Measurements:

  • Zone 1:
    • 0.3 µm: 11556
    • 0.5 µm: 8563
    • 1.0 µm: 5237
  • Zone 2:
    • 0.3 µm: 1039
    • 0.5 µm: 623
    • 1.0 µm: 374
  • Zone 3:
    • 0.3 µm: 748
    • 0.5 µm: 290
    • 1.0 µm: 207
  • Zone 4:
    • 0.3 µm: 1829
    • 0.5 µm: 748
    • 1.0 µm: 374
  • Zone 5:
    • 0.3 µm: 1454
    • 0.5 µm: 665
    • 1.0 µm: 415

 

Attachment 1: IMG_20260707_133309.png  106 kB  | Show | Show all
Attachment 2: 2026-07-07_13-5-50_cleanroom_chart.png  201 kB  | Show | Show all
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