COB制程控制English.docx

1、COB制程控制EnglishTO:linghua;yangdexing;chengweifeng;liubaochang;huangfulong;jiangweiming;huangjiajun;konglihuaContent1 Purpose2 Scope3 Production Flow Chart 4 Production Preparing4.1 Production Input 4.2 Material4.3 Equipment、Instruments、Tool and Jig4.4 Others, such as the production operator and worki

2、ng instruction5 Production Process Control 5.1 PCB Cleaning 5.2 D/A 5.3 Curing 5.4 W/B5.5 Coating5.6 Vacuum the air bubble exist in epoxy 5.7 Curing 5.8 Final Checking5.9 Defects repairing and material management control 6 Bonder parameter setting control 6.1 AB509A、AB509 bonder parameter6.2 AB559 b

3、onder parameter7 Equipments、Instruments、tool and Jig maintenance7.1 Curing stove 7.2 Bonder and wedge7.3 Refrigerator7.4 Vacuum-desiccator7.5 Test Jig8 Record9 Effective DateREVISION/AMENDMENT HISTORYDATEREV PAGEDESCRIPTION2002-4-12A0ALLFirst Issue2002-5-30A1ALLItem 4.3.4 adding content；2003-3-13A2A

4、LLCancel alcohol ultrasonic cleaning; Testing the viscidity of epoxy should be performed by IPQC instead of PE. Revise Process Control P-chart and Epoxy Temperature Controlling table.2003-9-4A3ALLRevise item 4.2.1 content, add item 4.5.1.62005-12-12A4AllAdd item 5.1.3(adding FR-1 PCB cleaning) and R

5、evise item7.5.1(adding golden sample) 1 Purpose Set up the COB production process management2 Scope It was used only for COB process management in Namtai.3 Production Flow Chart 4 Production Preparing4.1 Production PROD/PE/ST member get ready to produce according to the production plan and productio

6、n Notice. 4.2 MaterialST prepares material and sends to PROD material room according to the production plan and the material sending out notice. The person in charge of material of PROD dept should check the qty and type, and send the material to production line on schedule. 4.3 Equipment、Instrument

7、s、Tool and Jig According to the Production Line transfer notice, PE prepare the relevant Equipment、Instruments、Tool and Jig and make sure all of them were in good conditions. (For special issues, PROD need to inform PE to prepare beforehand 2 hours early. 4.4 Others, such as the production operator

8、and the working instruction4.4.1 PROD personnel arrange the production operator and the working station according to the Production plan. 4.4.2 The Production Line Leader with responsibility for putting the working instruction and track record table on each station, makes sure every operator underst

9、and the instructions and can follow the instruction strictly. Operator should wear the ESD wrist as requirement. 4.4.3 PE should prepare the COB Engineering Documents, the facility, tooling and Jig. PE is with responsible for analyzing and solving the quality abnormality.4.4.3 IPQC should do inspect

10、ion according to and described.5 Production process control5.1 PCB Cleaning5.1.1 The FR-4 PCB with Vacuum package can be put in use directly.5.1.2 For those FR4 PCB that has passed SMT station first, the operator needs to use rubber to clean the bonding area just as the working instruction request.5

11、.1.3 Base on the requirement noted in each models working instruction, the operator need use the auto-wiping machine to clean up the film covered on the bonding area of the FR1 PCB. 5.1.4 After cleaning job was finished, put the PCB into the turnover box and flow to next station. 5.1.5 IPQC should d

12、o first products inspection to verify the PCB cleaning effects after PCB was cleaned. Each time sampling 1 PCS for each model to check whether the golden finger in PCB bonding area was clean enough and record the checking results in and keep the records for one year. IPQC issues the Defects Improvem

13、ent Notice and requests the relevant dept analysis the root cause and do any improve actions if there are any problems occur. IPQC will follow and confirm the improve effect. For New Model trial run, IPQC only need fill .5.2 Die Attaching5.2.1 Operator confirms the PCB and Dies type and make sure it

14、 is consistent with the working instruction, then put it into proper aluminum box piece by piece; check the glue type and drop the glue on the PCB; use vacuum pen to fetch the die and place it on the glue with proper direction. All the actions should be proceed according to the working instruction.

15、5.2.2 Operator need fill the D/A date, shift NO, quantity and IC Lot No. in the trace sheet after finish producing about twenty boxes PCB, and with signatures as well. PROD should keep the trace sheet for three months.5.3 Curing5.3.1 The PCB with attached Dice needs to be sent to the relevant stove

16、to curing or places it to the appointed area waiting for curing naturally.5.3.2 IPQC sampling checkAccording to the checking items noted in each models working instruction, IPQC do cosmetic inspection for those PCB which was finished D/A and ready to curing one time each day, each time sampling 1PCB

17、 for each model, checking whether the ICs type was right and IC was in smooth position with right direction, making sure there are no cosmetic objections such as broken, notch, foreign material and so on. Record the checking results in IPQC Sampling Checking Record Process Control P-Chart, keep the

18、records for one year. If there are any problems, IPQC need issue the Defects Improvement Notice and requests the relevant dept analysis the root cause and do any improve actions. IPQC will follow and confirm the improve effect. For New model trial run, IPQC only need fill . 5.4 Wire Bonding5.4.1 The

19、 operator should verify the COB parts and the bonding program and the working instruction is consistent with each other, and can begin to work after all was confirmed OK. Following the requirements listed in the working instruction and COB current Inspection Standard, the production operator need to

20、 do function test and cosmetic inspection for all products, fill the checking results in the Single Inspecting Record sheet as well. 5.4.2 Operator need fill the trace sheet, record the Machine No., quantity, Date and the operator after finished producing about twenty boxes PCB 5.4.3 For those defec

21、ts that failed for repairing by operator should be labeled and sent to the repairman for repairing. 5.4.4 Stop production when there are defects over the limit, and inform PROD supervise and PE technician in time. The production line leader should issue the .5.4.5 Line leader write Transfer Notice a

22、nd inform PE technician to prepare for another products production. Operator or line leader inform PE technician to adjust the machine when problems occur. PE technician need fill the Bonder Using Record when transfer or adjust the machine, and keep the record for half year.5.4.6 PE Checking5.4.6.1

23、Appearance and function check PE technician should do the appearance and function check after transfer or adjust the bonder. And check the appearance and function twice for each day fill the results in . PE should keep the records for half year. 5.4.6.2 bonding wire pull measure PE technician should

24、 do bonding wire pull test after transfer or adjust the bonder, fill the results in . The bonder can be put in use till the appearance, function and pull test was verified OK.5.4.7 IPQC inspection5.4.7.1 Cosmetic CheckingAccording to the , IPQC do the appearance inspection for COB products that was

25、finished bonding for each bonder machine every two hours for each shift. Each time sampling check 1PCS, and fill the checking results in .5.4.7.2 Bonding wire pull test IPQC check 1PCS products and do the bonding wire pull test when there is model change. And check 1PCS and do the bonding wire pull

26、test every tree days for those products is continual producing over three days. Test six wires (four corners and the middle of left and up side) pull and record the result in . IPQC will keep the chart for one year. 5.4.7.3 Function sampling checkingEach day, IPQC sampling check the function of 1PCS

27、 products that were already finished bonding and passed the function test. Record the test results in . When found some defects, IPQC need issue the Defects Improvement Notice and requests Responsible dept analyses the root cause and do any improve actions. IPQC shall keep the Defects Improvement No

28、tice for one year. After sampling checking, IPQC should sign and fill the defects QTY, inspected QTY, defect rate in trace sheet. 5.4.7.4 Defects judge and solve5.4.7.4.1 IPQC supervisor shall check or amend the limits of the control chart termly. 5.4.7.4.2 The judgment for uncontrolled process:a. T

29、he data point over the control limit.b. Continual Seven points was go up or drop down.c. The data point was change periodically.5.4.7.4.3 When found some defects, IPQC need issue the Defects Improvement Notice and requests responsible dept analyses the root cause and do any improve actions. IPQC wil

30、l follow and confirm the improve effect.5.4.8 Bonding wire pull testing guidance5.4.8.1 Tools: microscope、pull meter、iron wire5.4.8.2 Test six wires pull (four corners and the middle of left and up side, refer to below illustration). The minimum pull of 1.25mil wire greater than or equal to 5g is OK, for 1.00mil wire, the minimum pull should greater than or equal to 4g is OK. (It is NG if Point A or E was broken) Pull Measure illustration： 5.5 Coating5.5.1 According to the working instruction requirements, the production operator chooses the proper epoxy for different products for coat