week 4

26.04.10(Monday)

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- Checked and updated the VFP min limit and 6 Bin of FT2 and QA for SMB package.

- Uploaded VFP min limit = 0.2 for SMA package.

- Uploaded VFP min limit = 0.2 for SOD123 Flat Lead package.

*6 Bin is actually a program that can identify what is the cause of rejection of the particular die.

27.04.10(Tuesday)

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- Continued upload VFP min limit for SOD123 Flat Lead package.

- Tested and verified the rejected SO8 Flat Lead unit.

- Learned the formula to find pass yield and fail yield percentage.

pass yield =(no. of good unit/no. of tested unit) x 100%

fail yield =(no. of bad unit/no. of tested unit) x 100%

- Learned how to analyze the summary for shop order.

- Uploaded the Maverick Lot Trend from January until April for 8 types of packages stated in previous post.

28.04.10(Wednesday)

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- Analyzed the shop order summary.

- Verified and serialized the rejected unit.

* serialize means have to write number on the tested unit by followed the testing sequence.

- Arranged the lot in production line according to the MPN number and lot number.

- Uploaded the 6 bin program and VFP min limit = 0.2 for FT2 of SMB package.

- Uploaded the VFP min limit for QA of SMB package.

29.04.10(Thursday)

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- Analyzed the shop order summary.

- Verified 10 units of rejected SO8 Flat Lead.

- Explanation of the X-ray photos of die by supervisor.

- Measured the area of die and total number of void with referred to the X-ray photos taken.

* void is the bubbles(air) in the glue between the die and the mold.

- Took 30 readings of top package and 30 readings of bottom package for machine Q30 and Q33.

Examples of readings included left lead width, right lead width, lead length and etc.

30.04.10(Friday)

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- Uploaded VFP min limit = 0.2 for SMA package.

- Uploaded VFP min limit = 0.2 for SMB package.

- Tested and verified 10 units of rejected SO8 Flat Lead in machine Q40. Saved the data(.dta) and converted it into .csv file.

- Measured the area of die and total number of void for lot 4833.

# End of one month of training and finally got the first month salary..^^ #