The most popular ball attach technology in the industry is the use of pin transfer using paste flux and solder sphere . Alpha provides industry leading fluxing technolgoy for 100% first pass yield for sphere attach process on ENIG, ENEPIG and CuOSP pad finishes. Alpha sphere attach solutions demonstrate superior solder ball coplanarity, solder ball height, solder ball diameter and high solder ball shear for robust process yields even on poor surface conditions
Paste Flux
| Product Name |
Material Type |
Deposition Method |
Properties |
Component Type |
| Pin Transfer |
Print |
Dip |
Halide Free |
Activity |
Vicosity |
Tackiness |
| NCX PRL-507 |
Epoxy |
|
o |
|
|
Lo |
Hi |
Hi |
Wafer |
| WS600-MHV |
Water Soluble |
o |
o |
o |
o |
Hi |
Hi |
Hi |
BGA/wafer |
| WS9180-MHV |
o |
o |
o |
o |
Hi |
Hi |
Hi |
BGA/wafer |
| WS9160-M7 |
o |
o |
o |
o |
Hi |
Med |
Hi |
BGA/wafer |
| WSX-HF-HAHV |
o |
o |
o |
o |
Hi |
Hi |
Hi |
BGA/wafer |
Sphere
|
|
Alloy
|
Elemental Composition
|
Melting Point (C)
|
Atttribute
|
|
Tin (Sn)
|
Lead (Pb)
|
Silver (Ag)
|
Copper (Cu)
|
Nickel (Ni)
|
Bismuth (Bi)
|
Eutectic
|
Solidus
|
Liquidus
|
|
Tin- Lead
|
Sn63/Pb37
|
63
|
37
|
-
|
-
|
-
|
-
|
183
|
-
|
-
|
Eutectuc Tin-lead
|
|
Sn62/Pb36/Ag2
|
62
|
36
|
2
|
-
|
-
|
-
|
179
|
-
|
-
|
Eutectuc Tin-lead Silver
|
|
Lead Free
|
SAC105
|
98.5
|
-
|
1
|
0.5
|
-
|
-
|
|
217
|
228
|
Industry standard low silver alloy
|
|
SAC125 w/Ni
|
98.3
|
-
|
1.2
|
0.5
|
250-500
ppm
|
-
|
|
217
|
228
|
|
SAC305
|
96.5
|
-
|
3
|
0.5
|
-
|
-
|
|
217
|
221
|
Industry stardard lead free
|
|
SAC405
|
95.5
|
-
|
4
|
0.5
|
-
|
-
|
|
217
|
225
|
Industry stardard lead free
|
|
Sn96.5/Ag3.5
|
96.5
|
-
|
3.5
|
-
|
-
|
-
|
221
|
-
|
-
|
Industry stardard lead free
|
|
Sn42/Bi57.6/Ag0.4
|
42
|
-
|
0.4
|
-
|
-
|
57.6
|
|
|
138
|
Lead free low melting point
|
|
SACX0307
|
98.9
|
-
|
0.3
|
0.7
|
-
|
0.1
|
|
217
|
228
|
Best in class drop shock reliability
|
|
SACX0307 Plus
|
98.9
|
-
|
0.3
|
0.7
|
|
0.1
|
|
217
|
228
|
|
MaxRel
|
Proprietary
|
|
212 |
220 |
Best in class thermal cycle reliability and drop shock
performance
|
|
MaxRel Plus
|
|
209 |
220 |
|
HRL1
|
|
138 |
151 |
Best in class thermal cycle reliability and drop shock
low temperature alloy
|