1. UV glue dispensing studies
S Pyatt
UV glue dispensing studies
on the Dima Dotmaster
Glue gap checks

2. S Pyatt
The study involves the testing of 3 UV cure glues.
The candidates are:
Loctite 3525
Dymax 6-621
Dymax 3013
Previous tests have shown that all 3 glues are suitable for dispensing on the Dotmaster.
Target masses are obtainable using glue dispensing settings used in previous test:
Loctite second dispense. Blue 22 gauge needle. 0.6mm needle gap. 1 bar.
Dymax second dispense. Red 25 gauge needle. 0.3mm needle gap. 1 bar.
Dymax second dispense. Clear 27 gauge needle. 0.2mm needle gap. 1 bar

3. S Pyatt
Use the dispense test jig as normal on the Dotmaster
Dispense dots in situ on Dotmaster
Place shims and another glass slide on top (Maybe
consider adding a weight on the top of the top glass slide
to hold it steady)
Use UV lamp to cure glue dots
Glue dots
Glass slides
Shims
76 microns
Glue dispense test jig

4. S Pyatt
Accurate 5 dot glue patterns are created that match the pattern currently used on the glue stencil.

5. S Pyatt
The glass slide with the dispensed dots are placed on the die bonder. 76 micron shims are placed and another glass slide is place on top

6. S Pyatt
The glass slide assembly is UV cured

7. S Pyatt
Loctite 3525
Slide g g 2.07mg
Slide g
Slide g g 2.23mg
Slide g
Slide g g 2.17mg
Slide g

8. S Pyatt
Loctite 3525

9. S Pyatt
Dymax 6 621
Slide g g 1.96mg
Slide g
Slide g g 2.13mg
Slide g
Slide g g 2.16mg
Slide g

10. S Pyatt
Dymax 6 621

11. S Pyatt
Dymax 3013
Slide g g 2.50mg
Slide g
Slide g g 2.46mg
Slide g
Slide g g 2.46mg
Slide g

12. S Pyatt
Dymax 3013