Precision Die-Cut Kapton Polyimide Film Gaskets | Clear Release Liner & Burr-Free - STK Tape
STK's Die-cutting High Temperature polyimide film tape are elite-grade, high-temperature dielectric isolation components custom-stamped to fulfill the rigorous component-density requirements of modern micro-electronics, smart hardware devices, and high-frequency power modules. Utilizing genuine, dimensionally stable polyimide substrate film, these custom assets are converted under strictly monitored environments into tight-tolerance isolating rings, window frames, or multi-layered shielding sheets capable of handling sustained baking heat up to 260℃.
Upload CAD / PDF Schematic Blueprint for a Precision Prototype
Advanced Liner Engineering: Optimizing EMS Automated Assembly Throughput
For high-volume electronic manufacturing services (EMS), the delivery format of a die-cut part is just as vital as its material characteristics. Standard paper backings frequently tear or flex during high-speed continuous winding, causing production line stoppages. STK solves this with specialized liner engineering:
Premium Fluorosilicone PET Release Liners
We supply our custom polyimide gaskets mounted exclusively on ultra-flat, high-transparency PET films coated with specialized fluorosilicone release chemistry. This setup offers highly stable, predictable low release forces, preventing the fragile polyimide shapes from stretching, warping, or distorting during matrix stripping.
Integrated Custom Pull-Tabs (Easy-Peel Configurations)
We specialize in fabricating custom gaskets with extended liner backings or dedicated non-adhesive pull-tabs. This allow your manual assembly operators or high-speed vacuum pick-and-place nozzles to grip, separate, and deploy parts instantaneously, dramatically accelerating your hourly UPH (Units Per Hour) output.
Technical Specifications
| Product Name | Die-cutting High Temperature polyimide film tape | ESD Die-cutting High Temperature polyimide film tape | |||
| Film thickness (um) |
25um | 50um | 75um | 125um | 0.025 |
| Total Thickness (mm) |
60um | 90um | 120um | 160um | 0.06 |
| Adhesive type | Silicone | Silicone | Silicone | Silicone | Silicone |
| Backing | Polyimide film | Polyimide film | Polyimide film | Polyimide film | Polyimide film |
Color |
Amber/Black | Amber | Amber | Amber | Amber |
| Release Liner | PET film | PET film | PET film | PET film | PET film |
| Adhesion to Steel(N/25MM) | 6±2 | 6±2 | 7±2 | 7±2 | 7±2 |
| Elongation at break (%) | 25%-55% | 25%-55% | 25%-55% | 25%-55% | 25%-55% |
| Breakdown Voltage (KV) | 3.5-4 | 5-8 | 7-10 | 7-10 | 5-8 |
| Anti-Static | / | / | / | / | 10^5-10^9 |
Short-term temperature(℃) |
300 | 300 | 300 | 300 | 300 |
Long-term temperature(℃) |
260 | 260 | 260 | 260 | 260 |
Primary Smart Device Application Fields
FPC (Flexible Printed Circuit) Insulation: Precision stamped insulating backings and stiffener reinforcement gaskets for multi-layer flexible circuit tails inside smart wearables.
Compact Camera Module (CCM) Shading: Laser-cut ultra-thin matte polyimide rings for internal lens barrel cushioning and dust shielding.
Lithium Battery Tab Thermal Guarding: Custom geometric insulation wraps protecting power terminals inside pouch-cell batteries from micro-shorts.
Micro-Acoustic Drivers & Haptics: Die-cut spatial washers providing dielectric barriers inside miniature acoustic voice coils and haptic motors.
Alternatives / Comparison
Brand Alternatives
Equivalent to: DuPont Kapton Die-Cut Film
Comparable to: Nitto Polyimide Insulation Film
Comparable to: tesa PI Insulation Material
Comparable to: Saint-Gobain Polyimide Film Components
Comparison Logic
Same polyimide insulation material structure
Similar high-temperature dielectric performance
Used in PCB, semiconductor, and EV battery industries
Comparable precision converting and insulation capability
Cost-Effective Alternatives
Factory direct die-cut PI film solutions provide:
Cost savings of approximately 30%–60%
Custom shapes and dimensions
Precision kiss-cut & laminated structures
OEM insulation component manufacturing
Cleanroom die-cutting support
Equipment
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