Surface Mount Technology

SMT

Solder paste and solder preforms are the two most commonly used solder materials for SMT PCB assembly.  Alpha offers a number of solder pastes, solder preforms and surface mount adhesives ideal for SMT processing to increase throughput and decease potential reliability defects.

Alpha Products for SMT

 Alpha Solder Paste

Product Lead-Free SnPb Low Temp High Reliability Low Ag Water Soluble
CVP-390
X
    X
 
CVP-520
X
  X
     
OM-338 L2
X
         
OM-338PT
X
         
OM-340
X
      X
 
OM-353
X
      X
OM-363 X



 
OM-5002
  X        
OM-6106
  X        
OM-535
X

X


 
PoP-707

         
WS-820
X     X   X
WS-852 X   X
X
  X

 

Alpha Solder Preforms

Solder preforms in tape and reel packaging provide an automated method to selectively increasing solder volume. The product is offered in many standard chip capacitor/chip resistor sizes, including 0201, 0402, 0603, 0805, 1206 and other intermediate sizes.


  • Tape and Reel PreformsAlpha Tape and Reel Preforms - Tape and reel preforms provide a method to improve time to market by eliminating the need to change PCB layout or stencils to achieve an increase in printed solder paste.

Preform Sizes

Preform Size Chart
 


Washer

solder preform washer

Rectangle

square solder preform

OD
Min = .020" (0.51mm)
Max = 3.00" (76.0mm)
ID
Min = .008" (0.2mm)
Max = OD - .010" (0.25mm)
T (Thickness)
Min = .002" (0.05mm)
Max = .110" (2.80mm)
S (Side)
Min = .020" (0.51mm)
Max = 2.30" (58.0mm)
T (Thickness)
Min = .002" (0.05mm)
Max = .200" (5.00mm)

 

Surface Mount Adhesives

Name Color Description VISCOSITY, ASTM-D-1824
(RVT SPINDLE #7)
Epibond® 7275 Red Original formula ideal for each of the deposition methods.
Designed specifically for high speed applications.
cps @ 1 rpm: 3,200,000
cps @ 10 rpm: 420,000
Epibond® 7275-1 Red Slightly less viscous modification of the Epibond® 7275. Preferred for certain application equipment. cps @ 1 rpm: 2,500,000
cps @ 10 rpm: 320,000



 

Alpha Stencils


Alpha Solutions for SMT

Reliability

Process

Compliance


 



 
  
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