‌Manual Tape Application vs. Integrated Forming: A Comparison of New Insulation Processes for Shielding Covers‌

As consumer electronics and automotive electronics increasingly demand smaller and more reliable electromagnetic shielding covers, the traditional manufacturing process involving manual application of insulating tape has gradually become inadequate for the mass production of precision stamped parts. Dongguan Bosi Hardware Electronics Co., Ltd. has introduced an integrated shielding process, based on a patented composite solution of “polyester film + metal substrate,” which offers a more efficient and stable alternative for the insulation treatment of shielding covers, covering process, performance, cost and quality control.

‌I. Core Pain Points of the Traditional Tape Application Process‌

The traditional insulation treatment for shielding covers follows a process of “stamping → manual application of insulating tape.” The insulating layer is realized by a tape consisting of a 25-micron polyester film and a 50-micron adhesive layer, which not only results in a relatively high overall thickness, making it difficult to meet ultra-thin requirements, but also presents multiple production pain points:

• ‌Poor insulation adaptability:‌ Manual tape application imposes significant limitations on the structural shapes of shielding covers. For narrow shielding frames, stacked or complex concave-convex structures, it is difficult to achieve complete tape adhesion, leading to inadequate short-circuit protection in some products and compromised reliability.
• ‌High process compatibility cost:‌ The subsequent reflow soldering process requires high-cost polyimide tape to meet temperature requirements, further increasing the production threshold.

• ‌Unstable mass production and quality control:‌ Manual operation is prone to precision variations, easily causing poor flatness and appearance defects in the shielding covers. Additionally, manual tape application is inefficient, leading to poor product consistency and difficulty in managing delivery schedules.
  

‌II. Core Advantages of the Integrated Shielding Process‌

To address the limitations of the traditional process, the new process uses a patented composite material of “polyester film + metal substrate,” and the workflow is optimized to “composite material processing → stamping.” Automated lamination replaces manual tape application, fundamentally resolving the traditional pain points:

• ‌Ultra-thin insulation & full form adaptability:‌ The pure polyester insulating film without an adhesive layer is only 25 microns thick. Combined with the metal substrate through composite forming, it achieves an ultra-thin insulation solution with a total thickness of just 0.125 mm (substrate 0.1 mm + polyester film 0.025 mm). The insulating layer is integrally formed during the composite stage, eliminating the need for subsequent tape application. Regardless of the complexity of the structure, the insulation layer achieves seamless coverage, completely solving the short-circuit protection issue.
• ‌Process compatibility & flat appearance:‌ After the composite material is stamped, the insulating layer and the metal substrate become integrated, requiring no additional treatment. This not only avoids flatness defects caused by manual tape application but also gives the product a cleaner and more attractive appearance. Moreover, the high-temperature resistance of the composite material perfectly meets reflow soldering requirements, eliminating the need to purchase costly specialized tape, thus simplifying the process and reducing material costs.
• ‌Automated mass production & full-chain quality control:‌ Relying on automated equipment for composite processing and stamping, the new process is not limited by the shape or size of the shielding covers, enabling stable large-scale production. This significantly improves efficiency and reduces per-unit cost. Meanwhile, the automated workflow enables full-chain quality management, greatly enhancing product consistency and allowing for precise control over delivery schedules.

‌III. Verification and Competitive Advantages‌

Currently, the integrated shielding process has passed multiple performance verifications by authoritative institutions, including heat resistance, insulation resistance, dielectric breakdown voltage, moisture resistance and electromagnetic shielding tests, with all indicators meeting industry standards. Compared with the traditional tape application process, the new solution builds competitive advantages across all dimensions of performance, cost, quality, and delivery, providing customers with a more cost-effective solution for EMI shielding components and assisting products in achieving miniaturization and high-reliability upgrades.