Line tour: Improvement items (Required action plan)
1. Die attach: Green wire moving and touched the part of machine when machine running
2. FOL and EOL oven: Denso faced the problem from other supplier. The oven was open before due time. During waiting for installing interlock, suggest Spansion to attach visual aids at the oven to inform the status of the lots inside.
3. Functional test (WB): Have space constraint and 5S needed to be improved.
4. FOL: Trolley parking is out of the line. Spansion need to survey whole areas for improvement
5. Ball attach: Some employees did not wear mask. Spansion to investigate for improvement (requirements, training)
6. Ball attach: UV gauge show actual value closing to the gauge limit. The value should be at the center of the limits. Spansion to review.
7. FOI: Denso faced missing ball from other suppliers. Spansion does not have procedure of inspection - ‘operators have to finish inspection all units in a tray before leaving station’
8. Test: Insulators of Liquid Nitrogen tube connected to the tester were damaged
9. Found many machines having scratch lines at the machine surface. Spansion to investigate the cause and transportation for improvement and repaint the machines.
10. Die attach: the handler arm of wafer cassette was damaged and has been wrapped with a glue tape. Spansion should replace the handler.
11. Laser mark pin 1: barcode on magazine looks blur (old) and should replace
12. Ball attach: Inspection the missing ball by machine is currently sampling. The dummy should be bare substrate for machine to detect all balls, not only sampling.
Line tour: Confirmed item (Depends on Spansion to do or not do)
1. Die bank:
a. Should define the maximum height of wafer jar stacking (although it is empty jar)
b. Found a glue tape (pink) attach to the wafer jar. When operators unpack the jar, recommend to remove out all glue tape.
2. Gauge identification:
a. Die attach: Gauge for air pressure currently is not used for lot production. Should define clearly between ‘in use’ and ‘not in use’.
b. Ball attach: Gauge at the bottom of the machine should be reviewed because the scale is not suitable
3. FOI: Separate reject mode at first just after operator found reject. Currently the practice is counting and separate reject mode after finish inspection the lot.