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SOLDER PASTE PRINTING PHOTO ALBUM

01 Solder paste skips or halos on tin lead pads
02 Solder paste slumping after print
03 Solder paste in holes after cleaning
04 Solder paste smudged print
05 Variable paste volumes
06 Solder paste skipping on pads
07 Slight misalignment of paste deposit
08 Solder paste shorts
09 Misalignment of paste print
10 Misalignment of paste print
11 Solder paste print on 0.020" pitch
12 Solder paste print smudge
13 Solder paste stencil misalignment
14 Poor paste release from stencil
15 Poor paste clean off
16 Smudged solder paste print
17 Misregistered solder paste print
18 Smudged solder paste print
19 Misaligneed print deposit
20 Smudged solder paste print
21 Smudged solder paste print
22 Incomplete paste release from stencil
23 Misaligned solder paste print
24 Smudged paste print or uneven separation
25 Smudged paste print or uneven separation
26 Solder paste scooped printing
27 Solder paste scooped printing
28 SOT23 solder paste print
29 Misaligned solder paste print
30 Poor paste release from stencil on SOT23
31 Minor misalignment of paste deposit
32 Misalignment of paste deposit
33 Misalignment of paste deposit
34 Incomplete paste deposits on SOT23
35 Smudged paste deposit
36 Paste deposit on PCB shield
37 Fine pitch paste deposit
38 Example of poor paste wash off
39
40
41
42
43
44 PIHR paste deposit on through holes
45 PIHR paste deposit on through holes
46 PIHR paste deposit on through holes
47 PIHR hold down paste deposit
48 Incomplete holdown paste deposit
49 PIHR paste deposit with through hole connector
50 PIHR paste deposit with through hole connector
51 Fine pitch paste print with component placed
52 PIHR paste deposit
53 PIHR paste deposit with connector inserted
54 PIHR paste deposit on through holes
55 PIHR paste deposit on through holes with connector
56 PIHR paste deposit
57 PIHR paste deposit on through holes
58 PIHR paste deposit on through holes
59 Paste deposit x-ray
60 Paste deposit x-ray
61Poor solder paste wash off
62 Poor solder paste wash off
63 Poor solder paste wash off
64 Poor solder paste wash off
65 Poor solder paste wash off
66 Poor solder paste wash off
67 Poor solder paste wash off
68 Poor solder paste wash off
69 Poor solder paste wash off
70 Poor solder paste wash off
71 Poor solder paste wash off
72 Poor solder paste wash off
73 Poor solder paste wash off
74 Satisfactory wash off of PCB
75 Satisfactory wash off of PCB
76 Satisfactory wash off of PCB
77 Satisfactory wash off of PCB
78 Satisfactory wash off of PCB
79 Poor cleaning of stencil
80 Poor cleaning of stencil
81 Poor cleaning of stencil
82 Poor cleaning of stencil
83 SEM of Poor quality paste particle formation
84 SEM of Poor quality paste particle formation
85 SEM of Poor quality paste particle formation
86 SEM of Poor quality paste particle formation
87 SEM of Poor quality paste particle formation
88 SEM of Poor quality paste particle formation
89 Component placement on paste deposit
90 Component placement on paste deposit
91 Component placement on paste deposit
92 Component placement on paste deposit
93 Component placement on paste deposit
94 Component placement on paste deposit
95 Component placement on paste deposit
96 Component placement on paste deposit
97 Component placement on paste deposit
98 Component placement on paste deposit
99 Component placement on paste deposit
100 Variation of paste deposit on pads
101 Variation of paste deposit on pads
102 Variation of paste deposit on pads
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118 Damage to stencil foil
119 Damage to stencil foil
120 Damage to stencil foil
121 Damage to stencil foil
122 Stencil laser cut with blocked aperture
123 Damage to stencil aperture bars
124 Damage to stencil aperture bars
125 Damage to stencil aperture bars
126 Damage to stencil aperture bars
127 Damage to stencil aperture bars
128 Damage to stencil aperture bars
129 Damage to stencil aperture bars
130 Poor stencil cleaning
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155 Dog ear prints
156 Paste deposit with large compressed particles
157 Modified stencil aperture print
158 Fine pitch print and placement on gold
159 1206 print and placement
160 Print and placement on tin finish
161Print and placement on Copper OSP finish
162 Print and placement on silver PCB finish
163 Reduced area paste deposit on copper OSP pads
164 Reduced area paste deposit on copper OSP pads
165 Reduced area paste deposit on copper OSP pads
166 Reduced area paste deposit on copper OSP pads
167 Reduced area paste deposit on copper OSP pads
168 Reduced area paste deposit on copper OSP pads
169 Reduced area paste deposit on copper OSP pads
170 Reduced area paste deposit on copper OSP pads
171 Reduced area paste deposit on copper OSP pads
172 Reduced area paste deposit on copper OSP pads
173 Reduced area paste deposit on copper OSP pads
174 100% paste deposit on pad surface
175 SEM view of paste deposit
176 SEM view of paste deposit
177 SEM view of paste deposit
178 SEM view of paste deposit
179 Paste deposit on through hole for PIHR
180 Paste deposit on pads
181 Paste deposit on pads
182
183 Paste deposit on pads
184 Chip component on paste deposit
185 Chip component on paste deposit
186 Chip component on paste deposit
187 Paste depoist on pads
188 Paste deposit on pads
189 Component on paste deposit
190 Component on paste deposit
191 Paste deposit on pads
192 Missing paste deposit
193 Missing paste deposit
194 Missing paste deposit
195 Paste deposit on pads
196 Paste deposit on pads
197 Paste deposit on pads
198 Paste deposit on pads
199 Paste deposit and gull wing terminations
200 Paste deposit and gull wing terminations
201 Paste deposit and gull wing terminations
202 Paste deposit and gull wing terminations
203 Paste deposit and gull wing terminations
204 Paste deposit and gull wing terminations
205 Paste deposit and gull chip terminations
206 Paste deposit and gull chip terminations
207 Paste deposit and gull chip terminations
208 Smudged paste deposit under gull wing termination
209 Smudged paste deposit under gull wing termination
210 Smudged paste deposit under gull wing termination
211 Smudged paste deposit under gull wing termination
212 Smudged paste deposit under gull wing termination
213 Paste deposit and misplace lead
214 Paste deposit on pads
215 Paste deposit on pads
216 Paste deposit on pads
217 Paste deposit on pads
218 Paste deposit on pads
219 Paste deposit on pads
220 Smudged paste deposit on pads
221 Poor paste wash off
222 Poor paste wash off
223 Poor paste wash off
224 Paste deposit on pads
225 Capacitor on paste deposit
226 Capacitor on paste deposit
227 Capacitor on paste deposit
228 Capacitor on paste deposit
229 Capacitor on paste deposit
230 Capacitor on paste deposit
231 Capacitor on paste deposit
232 Misaligned paste print
233 Paste deposit on pads
234 Paste deposit on pads
235 Paste deposit on pads
236 Paste deposit on pads
237 Paste deposit on pads
238 Capacitor on paste deposit
239 Paste deposit on pads
240 Paste deposit on pads
241 Capacitor on paste deposit
242 Capacitor on paste deposit
243 Capacitor on paste deposit
244 Capacitor on paste deposit
245 Stencil aperture etched brass poor
246 Stencil aperture etched steel average
247 Stencil aperture laser cut
248 Stencil aperture nickel
249 Stencil aperture nickel plated brass
250 Paste deposit on pads
251 0201 on paste deposit
252 0201 on paste deposit
253 0201 on paste deposit
254 0201 paste deposit
255
256 0201 paste deposit
257 0201 on paste deposit
258 01005 poor paste print
259 01005 poor paste print
260 01005 average paste print
261 01005 average paste print
262 01005 average paste print
263 01005 average paste print
264 01005 average paste print
265 01005 chip on paste print
266 PIHR paste printing on through hole
267 PIHR paste printing on through hole
268 PIHR paste printing on through hole with connector
269 PIHR paste printing on through hole
270 PIHR paste printing on through hole
271 PIHR paste printing on through hole
272 PIHR paste printing on through hole
273 PIHR paste printing on through hole
274 PIHR paste printing on through hole
275 PIHR paste printing on through hole
276 PIHR paste printing on through hole
277 PIHR paste printing on through hole
278 0201 paste deposit
279

The images are all copyright Bob Willis and should not be distributed by any other source.