Paste painting procedure

Safety Conditions

Before open the paste please read SDS File:ED7100 OSHA MSDS.pdf for the paste. Be sure that the following are available:

Ventilation

Working with paste is highly recommended under a good ventilation area, the hood is a good environment for work.

Poor Ventilation area

Wear a well fitted NIOSH approved or industrial type canister mask.[1], [2]

disposable apron

Paste Splashing

1- Gloves,goggles.

2- suitable protection clothes.

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

Technical procedure

Aim

ED7100 paste thickness effect on the electrical resistance of copper based material.

a- Look at the safety conditions before using the paste.

b- Equipment And Tools

55 to 77T polyester mesh, 200 mesh stainless steel screen, ER7 reducer, SW100, Oven, Multimeter, different shapes of Copper ( mainly 10X10 plate, wires), power supply, A pair of scissors, pliers, micrometer.

c- Before Processing Measurements

Measure the values of the resistors of each copper shape (if possible)using the multimeter or the multimeter and the power supply.

d- Paste Processing

1- Printing the paste using 55 to 77T polyester mesh. For tight resistances tolerance use 200 mesh stainless steel screen to reduce the distortion. try to get a uniform surface.

2- Clean the screen and stencil of the paste residues using SW100

3-Let the paste dry, recommended drying conditions are in the table below:

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

After Processing Measurements

Measure the resistors again after processing and summarize the result in table or figure.

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