Transparent heating solution

Transparent heating film and glass that use a silver nanowire (AgNW) transparent electrode to heat the whole glass surface evenly without obstructing the view.

01 Problem

What a difference in temperature costs you

Fogging, frost, condensation and icing are a constant nuisance in daily life, and in some situations they create a safety risk.

Vehicles · mobility
Ice and fog on the windshield
In low outside temperatures about 3mm of ice forms on the windshield, and the vehicle cannot be driven until the view is clear
Buildings · facilities
Condensation and drafts at the window
In winter, condensation makes windows hard to see through and leads to a draft you can feel and heating loss
Cameras · sensors
Environmental factors that affect autonomous driving sensors
Object recognition degrades in fog and misting — an essential future technology for the environmental problems facing autonomous driving sensors

Where existing solutions stop

Anti-fog agents: A chemical coating works only briefly and has to be reapplied
Heating wire: Visible, so it obstructs the view, and heats unevenly
ITO coating: High resistance and poor flexibility, so it cannot be used on curved surfaces
Warm air · hot air: Slow, local and power-hungry

02 Solution

A functional coating for flexible devices

Used as a thin, transparent conductive film, the material delivers useful properties through an optimized coating. It blocks ultraviolet and infrared efficiently while holding transmittance at 89.5% or above, and heats evenly once power is applied.

A multilayer coating structure

5-Layer · 125㎛ total thickness

Front protective film
Overcoat layer
Transparent heating layerThe core material · heats the whole surface evenly
Substrate (film, glass, etc.)
Rear protective film

An electron micrograph of an AgNW network, silver nanofibers tangled like a mesh

Silver nanowire (AgNW) network

SEM ×100k · 500nm

Silver nanofibers about 1/1,000 the thickness of a human hair tangle like a mesh and heat the whole surface evenly.

UV blocked70%↑
Thermal IR blocked10%↑

Standard specifications

Based on PET 125㎛

Item	Value	Basis
Substrate / thickness	PET 125㎛	±1%
Film width	Max. 1,200mm	KS M ISO 16012
Heating width	Max. 1,150mm	KS M ISO 16012
Sheet resistance	10 · 20 · 30 · 50 Ω/sq	ASTM F390
Heating temperature	90℃ ±10%	Film basis, MAX
Transmittance	89.5% or above	ASTM D1003
Haze	1.5 or below	ASTM D1003
Adhesion	5B or above	ASTM D3359

03 Technology

Technology proven by client companies

The material achieves optical and heating properties superior to other transparent electrode materials, with defrosting performance, reliability and durability verified.

Transmittance (50Ω)
97.38%
Bare Glass 92.89% · ITO 45Ω 97.02%
Time to heat (12V, 50Ω)
70℃ in about 300s
Heats faster than commercial ITO products
LiDAR cover power draw
60% lower
10W (against 25W)

Transparent electrode materials compared

Measured under identical conditions · in-house test basis

Item	BS ONE AgNW	Metal mesh	ITO	CNT
Sheet resistance	5~100 Ω/sq	5~20	30~100	100 or above
Transmittance	90% or above	87%	91%	86%
Flexibility	Excellent	Excellent	Not possible	Excellent
Process	Coating (large area)	Imprinting	Sputtering	Coating
Cost	Middle~Low	High	Middle	High

Defrosting performance verified

Ambient –15℃ · 3mm ice on the windshield · 12V applied

Side window

Windshield

Reliability verified

Thermal shock 1,500 cycles
–40℃ defrost 80% or above
Salt spray 240 hours
Overvoltage 16V for 24 hours
80℃ sustained for 669 hours
Rail standard KS C IEC 60571

04 Applications

Entering the market through PoC

We are extending into smart buildings, mobility, construction and other industries.

Ships and shipbuilding facilities
A heating film solution against condensation and icing on ships, in shipyards and in crane cabins
Case · Clearing ice and fog from wheelhouse glazing
Logistics and port facilities
A heating film solution against condensation and icing on crane cabin windows at ports and logistics terminals
Case · Transparent heaters installed across crane cabins
Rail and public transport
Applied to train windows and station facilities, and extended to heated seats in passenger cars
Case · Passed rail standard KS C IEC 60571
Autonomous driving and mobility
Heated glass for autonomous driving sensor covers and camera lenses, reducing environmental interference
Case · Heated glass for sensors exported overseas
Heavy equipment and industrial plant
Keeping the view clear through observation windows on STS crane cabins, incineration plants and similar industrial facilities
Case · Wider use of heated glass across cabin fronts
Architecture and smart buildings
Preventing condensation, fogging and icicles on zero energy building (ZEB) glazing
Case · PoC under way on public building glazing