Trial #1
To compare cleaning on front and back of samples.
Five readings were taken from both front and back of both sets of cleaned parts. Each set had four samples to be evaluated. Readings were recorded for each sheet and an average was calculated and compared to the back side readings for the same sheet. Any trends observed were to be noted.
SUBSTRATE MATERIAL: Tantulum metal sheets
CONTAMINANTS: Mobil Oil Corp, Vactra Oil Light
CONTAMINATING PROCESS USED: Received cleaned
In the first set of sheets, the results were varied as shown in Table 1. Two sheets had lower front side (Sheet 1 &2) readings and two sheets (Sheets 3 & 4) had lower back side readings. The second set of sheets had more consistent readings with 3 of 4 samples having a lower front side value. With the combined data, it was decided to rerun the samples with lower back side OSEE readings. After reevaluating the samples, only one of the sheets had lower backside readings. Table 2 lists the retested values for each sheet.
Table 1. OSEE Readings
| Coil Set 1
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Sheet 1
|
Sheet 2
|
Sheet 3*
|
Sheet 4*
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|
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Side 1
|
Side 2
|
Side 1
|
Side 2
|
Side 1
|
Side 2
|
Side 1
|
Side 2
|
|
|
261
|
378
|
348
|
373
|
373
|
382
|
360
|
305
|
|
|
259
|
437
|
238
|
342
|
345
|
392
|
337
|
324
|
|
|
284
|
425
|
346
|
401
|
356
|
343
|
334
|
332
|
|
|
276
|
382
|
376
|
386
|
424
|
287
|
345
|
306
|
|
|
255
|
372
|
353
|
420
|
378
|
410
|
342
|
309
|
| Ave
|
267
|
398.8
|
332.2
|
384.4
|
375.2
|
362.8
|
343.6
|
315.2
|
|
|
|
|
|
|
|
|
|
|
| Coil Set 2
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|
|
|
|
|
|
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|
|
|
Sheet 1
|
Sheet 2
|
Sheet 3*
|
Sheet 4*
|
|
|
Side 1
|
Side 2
|
Side 1
|
Side 2
|
Side 1
|
Side 2
|
Side 1
|
Side 2
|
|
|
239
|
311
|
180
|
339
|
223
|
248
|
274
|
207
|
|
|
214
|
302
|
210
|
262
|
224
|
248
|
287
|
251
|
|
|
289
|
303
|
220
|
265
|
241
|
317
|
295
|
301
|
|
|
209
|
328
|
223
|
295
|
261
|
240
|
270
|
272
|
|
|
184
|
284
|
206
|
306
|
268
|
252
|
319
|
317
|
| Ave
|
227
|
305.6
|
207.8
|
293.4
|
243.4
|
261
|
289
|
269.6
|
| *To Be Retested
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Table 2. Retested OSEE Readings
| Coil Set 1
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Coil Set 2
|
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Sheet 3
|
Sheet 4
|
Sheet 4
|
|
|
Side 1
|
Side 2
|
Side 1
|
Side 2
|
Side 1
|
Side 2
|
|
|
354
|
354
|
296
|
224
|
253
|
295
|
|
|
319
|
419
|
329
|
197
|
258
|
265
|
|
|
327
|
361
|
283
|
181
|
261
|
283
|
|
|
329
|
362
|
265
|
226
|
241
|
282
|
|
|
302
|
356
|
264
|
208
|
281
|
291
|
| Ave
|
326.2
|
370.4
|
287.4
|
207.2
|
258.8
|
283.2
|
OSEE readings were mostly lower for the front sides of the supplied sheets. The backsides were marked up by the conveyor system during processing.
No relation