Surface Mount Adhesives
Low cost, high density packaging of integrated circuits, lead-less chip carriers, and chip component attachment for ceramic substrates and PC Boards

TRANSENE SMA EPOXY ADHESIVES are formulated specifically for precision mounting of flat pack semiconductor devices, chip capacitors and resistors in the production of complex hybrid circuits. Preliminary physical attachment (staking) prior to wave soldering leaded devices or the direct mounting of discrete components and microwave devices (dual-in-line pack) is feasible for both electrically conductive and non-conductive attachment.

TRANSENE SMA EPOXY ADHESIVES include 1 and 2 part systems, color coded as required, supplied in customized packages to interface application techniques for auto-dispensing or screen printing. The various formulations offer non-corrosive systems with good handling characteristics: thixotropy resistant to trailing/stringing and adequate body to fill gaps and crevices. Quick cure, good adhesion, ability to withstand mechanical and thermal stress, wave soldering temperatures and clean-up solvents provide for wide application.

Color customizing available

PROPERTIES OF SURFACE MOUNT ADHESIVES

 

SMA-100

SMA-200

SMA-400

SMA-500

SMA-600

SMA-700

Feature

High Thermal Conductiviy

Low Moisture absorbtion

High Termal Low Temp Cure

Standard

Low Temp Cure

Long Pot Life

Application

Auto-Dispensing

Auto-Dispensing

Auto-Dispense

AutoDispense-Screen Print

Auto Dispense

Auto Dispense Screen Print

Composition

1 part/filled

1 part/filled

2 part/filled

1 part

2 part

2 part

Color

Red

Green

Black

Smooth silver paste

Smooth silver paste

Smooth silver paste

Viscosity

100,000 cps

90,000 cps

70,000 cps

80,000 cps

90,000 cps

90,000 cps

Shelf-Life @ 25 °C

6 months

6 months

6 months

6 months

12 months

12 months

Thermal Cond. BTU/hr/ft2/in/°F

12

4

10

75

80

80

Coef. of thermal exp(in/in/°Cx10-6)

23

30

20

50

60

60

Lap shear

1500 psi

2000 psi

2000 psi

1500 psi

1500 psi

1500 psi

Moisture Absorption

0.14%

0.05%

0.17%

--

--

--

(7 day imm.@ 25 °C

           

Vol resistivity(ohm/cm)

1 x 10-16

1 x 10-15

1 x 10-4

1 x 10-4

1 x 10-4

1 x 10-4

Dielectric strength v/mil

500

450

450

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Mix Ratio

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100:7

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100:3.6

100:2.5

CURE

115 °C-30min

115 °C-30 min

50 °C-20 min

125 °C-1hr

50 °C-30 min

100 °C-10 min

 

135 °C-1 min

135 °C-15min

75 °C-10min

150 °C-5min

75 °C-15min

125 °C-5min

Pot Life

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3 hrs

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2 hrs

40 hrs