GC38-Spec High-Purity Carbon-Based Barrier Membrane for Polyimide:
Product Introduction
The GC38-Spec High-Purity Carbon-Based Barrier Membrane for
Polyimide is a high-performance functional material specifically
engineered to combine the excellent mechanical stability of
polyimide substrates with the superior barrier properties of
high-purity carbon. As a specialized membrane solution, it is
designed to address critical protection needs in advanced
industrial and electronic applications, where reliability,
durability, and precision barrier performance are non-negotiable.
1. Core Product Characteristics
1.1 Ultra-High Carbon Purity & Uniform Coating
The membrane features a carbon-based barrier layer with industry-leading purity (≥99.9% carbon content, compliant with GC38 specification
standards), ensuring minimal impurities that could compromise
barrier efficiency or interact with sensitive components. The
carbon layer is deposited uniformly across the polyimide
surface—with a thickness tolerance of ±2%—eliminating weak points
(e.g., pinholes, uneven coverage) that often lead to performance
degradation in conventional barrier films.
1.2 Exceptional Barrier Performance
Targeting the permeation of moisture (H₂O) and oxygen (O₂)—two
primary causes of material degradation in high-value
applications—the GC38-spec membrane achieves moisture vapor transmission rate (MVTR) < 1×10⁻⁶ g/(m²·day) and oxygen transmission rate (OTR) < 0.001 cm³/(m²·day·atm). This level of protection effectively isolates polyimide-based
components from environmental humidity and oxidative damage, even
in harsh operating conditions.
1.3 Compatibility with Polyimide Substrates
The carbon-based barrier layer is designed for strong adhesion to
polyimide (PI) materials, with a peel strength of >5 N/cm that
resists delamination during processing (e.g., cutting, bending) or
long-term use. Additionally, the membrane preserves the inherent
advantages of polyimide—including high thermal resistance
(continuous use temperature up to 260°C), excellent chemical
stability (resistant to acids, alkalis, and organic solvents), and
low dielectric constant—making it suitable for temperature- and
chemical-sensitive environments.
1.4 Dimensional Stability & Flexibility
With a coefficient of thermal expansion (CTE) matched to polyimide
(15–20 ppm/°C), the GC38-spec membrane avoids warping or cracking
when exposed to temperature fluctuations. It also maintains
structural integrity under repeated bending (≥10,000 cycles at a
bending radius of 1 mm), making it ideal for flexible electronic
devices that require dynamic shape adjustment.
2. Key Application Fields
2.1 Flexible Electronics
As a critical protective layer for flexible OLED displays, flexible solar panels, and wearable
electronic sensors, the GC38-spec membrane prevents moisture and oxygen from
penetrating into delicate components (e.g., OLED emitters,
thin-film semiconductors). This extends the lifespan of
devices—such as foldable smartphones or flexible health
trackers—from 2–3 years to over 5 years in typical use.
2.2 Aerospace & Defense
In aerospace applications (e.g., polyimide-based wiring harnesses,
satellite components), the membrane’s high thermal resistance and
barrier performance shield materials from extreme temperature
changes (-60°C to 300°C) and low-earth-orbit (LEO) environmental
factors (e.g., atomic oxygen, micro-meteoroids). It also meets
aerospace-grade flame-retardant standards (UL94 V-0), ensuring
compliance with safety regulations.
2.3 Energy Storage
For high-performance lithium-ion batteries (LIBs) and solid-state
batteries that use polyimide as a separator or packaging material, the
GC38-spec membrane acts as a secondary barrier to prevent
electrolyte leakage and moisture ingress. This enhances battery
safety (reducing the risk of thermal runaway) and improves cycle
life (extending charge-discharge cycles by >30% compared to
uncoated polyimide separators).
2.4 Microelectronics & Semiconductors
In semiconductor manufacturing, the membrane is used to protect polyimide-based photoresists, interlayer dielectrics, and
microelectromechanical systems (MEMS) from moisture-induced degradation during wafer processing or
packaging. Its low dielectric constant (εᵣ < 3.0) also avoids
interference with signal transmission in high-frequency microchips.
3. Compliance & Customization
The GC38-spec membrane fully adheres to international material
standards (e.g., ISO 15106-3 for barrier film testing, ASTM D1003
for optical clarity). It is available in standard roll sizes
(width: 300–1500 mm, length: 100–500 m) and can be customized with
additional features—such as anti-reflective coatings or conductive
carbon layers—based on specific application requirements.
