Glass Paste

Selecting the glass and viscosity for your application

Glass paste is a uniform dispersion of powdered glass on a vehicle. We offer comprehensive guidance to help you choose the optimal glass type, viscosity, and other properties tailored to your specific needs.
・ Choose the glass best suited for your application from a wide range of options.
・ glass pastes can be applied directly in your coating process.
・ PLS-3123 and PLS-3124: These pastes form overcoat films with excellent laser trimming properties and moisture resistance.
・ PLS-3150B1: This paste offers superior acid resistance and maintains its color after electrode plating.
For guidance on glass selection, viscosity adjustments, or other technical specifications, please contact us.

Properties
Example Usages
Precautions for Use

Properties

Refer to the chart below for examples. Lead-free products are available upon request.
For guidance on glass selection, viscosity adjustments, or other technical specifications, please contact us.

Applications		Ag/Pd wiring and Ag/Pt wiring for hybrid IC		For chip resistors	For chip resistors	Various ceramics
		Overcoat		Secondary coat	Overcoat	Overcoating, sealing, and bonding
Glass code		PLS-3123	PLS-3124	PLS-3150B1	PLS-3901	PLS-3143
Firing conditions Peak hold time		Firing at 510°C for 10 minutes in air		Firing at 580–620°C for 10 minutes in air	Firing at 610°C for 10 minutes in air	Firing at 850°C or higher for 10 minutes in air
Screen		165-325 mesh
Post-firing film thickness	μm	10-50
Color tone		Green		Black	White	White (after firing, semi-transparent)
Paste viscosity	Pa・s	90	180	230	110	150
Coefficient of thermal expansion	×10^-7/K	67		70	67(30-300℃）	66
Softening point	℃	530		585	590	840
Diluent		Terpineol
Features		Forms glass films with high hermeticity and moisture resistance. Widely used in automotive hybrid ICs.	High viscosity type of PLS-3123	Good acid resistance
Type		Lead-containing			Lead-free

For guidance on glass selection, viscosity adjustments, or other technical specifications, please contact us.

Example Usage

Printing
Apply the paste onto the substrate using the screen printing method. Adjust the printing conditions to meet the requirements of your specific application.
Leveling
To ensure a smooth surface, allow the printed paste to level at room temperature for 5–10 minutes after printing.
Drying
Dry the paste at 100–150°C for 10–15 minutes.
Firing
Use a belt furnace or batch furnace for firing. To decompose organic components in the dried coating, a heating rate of 20–50°C per minute is recommended. To prevent damage to the substrate or glass film from thermal shock, cool at a rate of 20–50°C per minute.

Precautions for Use

Store the paste in a cool, dark place at or below 25°C, avoiding direct sunlight.
If the paste has been stored for an extended period, stir thoroughly with a stainless steel spatula or similar tool to ensure it is well-mixed and uniform.
Adjust viscosity if necessary.
Ensure adequate ventilation when using the paste, and avoid prolonged inhalation of solvent vapors.
If the paste comes into contact with your skin, wipe it off immediately.