EPO-TEK OG116-31

Single-component UV-cure optical epoxy, 20,000–30,000 cPs, Tg ≥115°C, die shear 27.8 Kg (UV+RT), ≥96% transmission @ 660–1,640 nm, refractive index 1.5842 for PCB and semiconductor assembly.

Product code:

OG116-31

Package size:

Shelf Life:

One year at room temperature (bulk)

RoHS Compliant

EPO-TEK OG116-31 is a single-component, UV-curable optical epoxy for PCB and circuit assembly in semiconductor, computer, and scientific OEM industries. Manufactured by Epoxy Technology, Inc., it offers high viscosity (20,000–30,000 cPs) for paste dispensing, Tg ≥115°C for solder reflow compatibility, and ≥96% transmission at 660–1,640 nm. Die shear reaches 27.8 Kg after UV + 24-hour RT post-cure.

Features & Benefits

High Tg ≥115°C — compatible with standard PCB solder reflow temperatures
Excellent optical transmission ≥96% @ 660–1,640 nm for optoelectronic assembly
High die shear 27.8 Kg (9,886 psi) after UV + RT cure for reliable bonding
Single-component — no mixing, simple dispensing for production automation
High refractive index (1.5842 cured) for precision optical coupling applications
Compatible with iron-doped mercury lamps, 365 nm LED, and pulsed mercury sources

Typical Applications

PCB-level optical component bonding and encapsulation in semiconductor assembly
Die attach and encapsulation in computer and scientific OEM optical modules
Optical fiber attachment and lens bonding in opto-electronic packages
UV-cure bonding of optical components requiring high Tg and transmission

Property	Value	Test Method / Condition
Color (before cure)	Cloudy White	Visual
Viscosity (23°C @ 10 rpm)	20,000–30,000 cPs	—
Thixotropic Index	1.3	—
No. of Components	Single	—
Glass Transition Temp	≥115°C	Dynamic Cure
Shore D Hardness	83	—
Die Shear — UV only	≥10 Kg (3,556 psi)	—
Die Shear — UV + 23°C/24 hrs	27.8 Kg (9,886 psi)	—
Die Shear — UV + 80°C/1 hr	27.1 Kg (9,637 psi)	—
Spectral Transmission	≥96% @ 660–1,640 nm; ≥92% @ 500 nm	—
Refractive Index (uncured)	1.5665 @ 589 nm	—
Refractive Index (cured)	1.5842 @ 589 nm	—
Particle Size	≤20 microns	—
Recommended Cure	Iron-doped Hg flood lamp >30 sec, 100 mW/cm² @ 240–365 nm	Alt: 365 nm LED >2.5 min

Property

Value

Test Method / Condition

Color (before cure)

Cloudy White

Visual

Viscosity (23°C @ 10 rpm)

20,000–30,000 cPs

—

Thixotropic Index

1.3

—

No. of Components

Single

—

Glass Transition Temp

≥115°C

Dynamic Cure

Shore D Hardness

—

Die Shear — UV only

≥10 Kg (3,556 psi)

—

Die Shear — UV + 23°C/24 hrs

27.8 Kg (9,886 psi)

—

Die Shear — UV + 80°C/1 hr

27.1 Kg (9,637 psi)

—

Spectral Transmission

≥96% @ 660–1,640 nm; ≥92% @ 500 nm

—

Refractive Index (uncured)

1.5665 @ 589 nm

—

Refractive Index (cured)

1.5842 @ 589 nm

—

Particle Size

≤20 microns

—

Recommended Cure

Iron-doped Hg flood lamp >30 sec, 100 mW/cm² @ 240–365 nm

Alt: 365 nm LED >2.5 min

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