1. Smart Screen
by Lisa Ho
Oct. 29, 2013

2. SMART 1 – Lifetime Improvement
SMART 2 – Paste Saving

3. Benefit (1)- Lifetime improvement
60% screens were damage by the uneven of wafer edge
30% cause by wafer’s chip
10% cause by paste’s particle
Adding softening agent in emulsion
= Avoid the object collision(emulsion & wafer)
= Increasing lifetime 20% at least

4. Benefit (2)- Paste Saving
How much you save!!
20tons=20,000kg/year
20,000*5%=1,000kgs
Paste Cost: USD1,000/kg
USD1,000*1000kgs
=USD1,000,000/year
Normal
Screen
120mg
Paste Saving
Screen
114mg
SAVE 5% =

5. Lifetime Increasing(Smart 1)
Principle and method:
Adding the softening agent in emulsion
on area (A.B.C.D) while exposure process. A B C D
Normal: M5 Emulsion
Adding softening agent on area A.B.C.D while exposure process.

6. Paste Saving(Smart 2) Principle and method:
reducing the friction coefficient
Mesh thickness
E.O.M
Add slipping agent on the bus bar location while exposure process
Printing result:
higher friction = higher paste transfer
reduce the friction = lower paste transfer = paste saving.

7. No change of appearance
Paste Saving(Smart 2)
No change of appearance
No change of E.O.M

8. All in One (Smart1+Smart2)B C D +
All in One
= Higher lifetime + Higher efficiency + Cost saving

9. Printing Result Analysis
Smart screen
Tradition screen

10. Testing Result

11. Thanks for your attention!!