Paste painting procedure

Purpose

This document description the application proceedures to safely apply the ED-7100 carbon paste. Using ED-7100 carbon paste is to avoid the sparks in TGEM-foil when the voltage is higher than 4900 V, in addition to use the paste for painting a neutron sensitive layer on the surface of the TGEM-foil after being mixed with Thorium-232.

Requirements for safe handling

Before opening the paste please read the ED-7100 Safety Data Sheet located at

http://wiki.iac.isu.edu/index.php/File:ED7100_OSHA_MSDS.pdf

Be sure that the following are available:

Ventilation

An externally venting fume hood is recommended when working with this paste or a work area with very good ventilation.

Poor Ventilation area

Wear a well fitted NIOSH approved or industrial type canister mask.

http://www1.mscdirect.com/CGI/NNSRIT?PMPXNO=1651332&PMT4NO=0

http://www1.mscdirect.com/Disposable-Respirators-And-Masks/Respiratory-Protection/Safety/s0000002069.HTML

Paste Spraying

1- Gloves,goggles.

2- suitable protection clothes.

3- sack of sand or absorber for cleaning the area.

Paste Application Procedure

Aim

ED7100 paste thickness effect on the electrical resistance of a copper plate. [1]

a- Look at the safety conditions before using the paste.[2]

b- Equipment And Tools

ED-7100 paste, cleaner, CLR A/F lens blue frame revolution dust goggles, 27"WD 36"L vinyl clear ansell chem-resist apron, 35"WD 45"L neoprne Black ansell chem-resist apron, 8511 N90 3M particulate respirator, Nitrile disposal gloves.

d- Paste Processing

1- Add the paste to copper plate.(using a brush or a semi-mechanical printer)

2- Clean the paste residues using the cleaner.

3- Curing for 1 - 2h 30min. at 150 - 165 degrees Celsius.(Contact the company for IR-curing)

Oven Curing Procedure

1.) put on mask and apron (use goggles if spraying paste using printer)

2.) establish a work area under hood in LDS

3.) mix paste (if reducing is needed) under the hood for sufficient ventilation

4.) use applicator to smear paste on pc-board

5.) cure past

6.) post processing/ cleanup

General information: 11/9/09

(call : electrica 877-867-9668 : Jeff miller 630-816-1865 or jmiller@toryon.com for an order),

Semi auto printer is recommended for the paste, the reducer should be added with very little quantities such that the characteristics of the paste will not change.

Jeff from electrica sent the following email:

Hi Haitham,
 I looked into screen printing equipment and found a manufacture by the name of M&R Printing, 
 if you go on the internet and type that in you can look to see if they have something that would fit. 
Other than that I know some people have used equipment.  With regards to the SW100 we have a material that is the same which is    
 our Additive T.  If you need a pint of that testing let me know.
Hope this helps
Jeff

I looked at the website related to printing equipments, they have many choices but I still need to discuss more about what do we need exactly.

I sent to him to send us additive T instead of SW100.

Nov.18

I called Jeff asking about the additive T , he is requesting a sample, since it comes usually in 65 gallon per sample. Also the sample will be sent to Tony Forest, Physics Department.

[[http://wiki.iac.isu.edu/index.php/Neutron_TGEM_Detector_Abdel#10.2F27.2F09_.28Paste_painting_procedure.29 ]]