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PCB Manufacture Protection-FMEA
                                          Potential Failure Mode and Effects Analysis
潜在缺陷模型及后果分析
Process : OET FMEA No.: PROD-FMEA/OET/   Page    1    of    2 Rev.: D
工序    : E-TEST FMEA 编号:
Orig. meeting minute No.: Review meeting minute No.: original date: Review Date:
制作会议记录编号 : 复审会议记录编号 : 制作日期 : 复审日期 :
/ / 1/10/2019 2019/1/15
Prepared by: Process Res. Dept. MGR or Supervisor: Approved by CFT authorized representatives
准备 : xiao lei zhou 工序责任部门经理或主管:Lei gang 交叉功能小组授权代表审批 : Li song bing
CFT Member(小组成员) : zheng xiao liang, chen rong guang, pang long, li song bing,xaio lai zhou, lei gang
Process Potential Potential Effects Potential Causes Current Process controls Current Process controls Recommended Responsibility & *Action Results
step Failure Mode of Failure S C of Failure O Prevention Detection D RPN Actions Target Completion Action was taken S O D RPN
工序步骤 潜在的缺陷 潜在的缺陷后果 潜在缺陷的原因 当前流程控制预防 当前流程控制检测 建议改善行动 Date
负责人&完成日期
E-Test Dent by pressing Affect appearance 7 1. Testing probes bent, 3 1. Check once per 30pcs. FQC 100% inspection, 3 63
and conductivity broken. After replacing testing probes,
shall inspect and ensure no
suppress then start E-Test.
2.Fixture misregistration. 3 2.Ensure that there will be 3 3 63
positioning when installing
fixture.
3.Hard foreign material on 3 3.1 Burnish fixture mold 3 63
   the fixture, mold surface surface with sandpaper, and
   is accidented. sweep clean with a brush
3.2 Inspect 30pcs before
fixing new fixture and check
 prior 3pcs and posteriority
 1pcs with 3X mirror
4.Too high pressure. 3 4. Check pressure gauge once 3 63
  per shift,control about 6-8bar
Missing Testing Affect component 10 1.The trouble with a machine. 1 2.Ensure E-tester parameter 2 20
on oper/short part function. is right & maintenance /
panel calibration per day.
2.Man-made mistake. 1 2.1Divide out different working 3 30
 a place for pass panels, reject
panels
S  –  Severity O – Occurrence D  –  Detection RPN(Risk Priority Number) = S × O × D
   严重性 机率性 检测性 风险优先数
                                          Potential Failure Mode and Effects Analysis
潜在缺陷模型及后果分析
Process : OET FMEA No.: PROD-FMEA/OET/   Page    2    of    2 Rev.: D
工序    : E-TEST FMEA 编号:
Orig. meeting minute No.: Review meeting minute No.: original data: Review Date:
制作会议记录编号 : 复审会议记录编号 : 制作日期 : 复审日期 :
/ / 1/10/2019 2019/1/15
Prepared by: Process Res. Dept. MGR or Supervisor: Approved by CFT authorized representatives
准备 : xiao lei zhou 工序责任部门经理或主管:Lei gang 交叉功能小组授权代表审批 : Li song bing
CFT Member(小组成员) : zheng xiao liang, chen rong guang, pang long, li song bing,xaio lai zhou, lei gang
Process Potential Potential Effects Potential Causes Current Process controls Current Process controls Recommended Responsibility & *Action Results
step Failure Mode of Failure S C of Failure O Prevention Detection D RPN Actions Target Completion Action was taken S O D RPN
工序步骤 潜在的缺陷 潜在的缺陷后果 潜在缺陷的原因 当前流程控制预防 当前流程控制检测 建议改善行动 Date
负责人&完成日期
Panel Scratches Affect appearance 8 1.Scratches between panel 1 1. Separate the PCB with FQC 100% inspection, 2 16
Transport- & conductivity and the panel.  a kraft paper whose size is
action function ability larger than the PCB, not allow
different panel size to be
mixed together.
3.Crash and slept down 1 3. Take board up or down 3 24
by handling. by handling.
Damaged corner Affect appearance 8 Crashed boards. 4 Take board up or down by Same as above 3 96
and seriously to scrap handling.
Board broken Direct scrap 10 1.Crash and drop-down PCB 4 Load or unload PCB lightly, FQC 100% inspection, 2 80
the PCB must be put into a box
 and its height must be lower
than box
2.Previous process board 4 Unload and test PCB lightly 2 80
   is broken.
Rework Solder mask or ink Affect appearance 8 Improper operation 4 customer’s spec to repaire. Same as above 3 96
touch up area is and seriously to scrap
too large.
Cut off the wire when Affect appearance 8 Wire close to operate 4 Find short and  to rework 100% test. 2 64
rework short and seriously to scrap difficultly
Drag Tin no-flat Affect appearance 6 Too much Tin on cauterant 4 Put proper Tin on cauterant FQC 100% inspection, 2 48
and seriously to rework and to check after drag tin.
Pooly mend wire Affect appearance 8 the mended curcuit isn’t 3 1.Repaire tab location with 100% test 2 48
and seriusly to scrap. corrrespond to the original.   silver ink.
2.According to  customer’s spec
to repaire.check the pcs with
10X mirrorafter repairing.
S  –  Severity O – Occurrence D  –  Detection RPN(Risk Priority Number) = S × O × D
   严重性 机率性 检测性 风险优先数
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