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Message ID: 344     Entry time: Wed Apr 17 09:08:47 2019
Author: Stephen 
Type: General 
Category: General 
Subject: OMC(004): Unwrapping and preparing breadboard 

[Stephen, Philip, Koji, Joe]

Breadboard D1200105 SN06 was selected as described in eLOG 338. This log describes unwrapping and preparation of the breadboard.

Relevant procedure section: E1300201 section 6.1.5

Breadboard was unwrapped. No issues observed during unwrapping.

  • Attachment 1: packaging of SN06.

Visual inspection showed no issues observed in breadboard - no large scratches, no cracks, no chipping, polished area (1 cm margin) looks good.

  • Attachment 2: engraving of SN06.

Initially the breadboard has a large amount of dust and fiber from the paper wrapping. Images were gathered using a green flashlight at grazing incidence (technique typical of optic inspection).

PROCEDURE IMPROVEMENT: Flashlight inspection and Top Gun use should be described (materials, steps) in E1300201.

  • Attachment 3: particulate before Top Gun, large face.
  • Attachment 4: particulate before Top Gun, small face.

Top gun was used (with medium flow rate) to remove large particulate. Breadboard was placed on Ameristat sheet during this operation.

  • Attachment 5: particulate after Top Gun

Next, a clean surface within the cleanroom was protected with Vectra Alpha 10 wipes. The breadboard, with reduced particulate after Top Gun, was then placed inside the cleanroom on top of these wipes. Wiping with IPA Pre-wetted Vectra Alpha 10 wipes proceeded until the particulate levels were acceptable.

Joe and Koji then proceeded with placing the breadboard into the transport fixture.


Attachment 1: IMG_7635_packaging_of_sn06.JPG  3.945 MB  Uploaded Wed Apr 17 10:28:30 2019  | Hide | Hide all
Attachment 2: IMG_7637_engraving_of_sn06.JPG  2.848 MB  Uploaded Wed Apr 17 10:28:35 2019  | Hide | Hide all
Attachment 3: IMG_7641_particulate_before_top_gun_large_face.JPG  2.703 MB  Uploaded Wed Apr 17 10:28:38 2019  | Hide | Hide all
Attachment 4: IMG_7644_particulate_before_top_gun_small_face.JPG  2.726 MB  Uploaded Wed Apr 17 10:28:42 2019  | Hide | Hide all
Attachment 5: IMG_7646_particulate_after_top_gun.JPG  2.912 MB  Uploaded Wed Apr 17 10:28:45 2019  | Hide | Hide all
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