一种带有双面铜环的FR4补强

By setting double-sided copper ring pads on the FR4 reinforcing plate and combining them with glass fiber reinforced epoxy resin material, the problem of weak copper pillar welding in FPC products was solved, achieving both welding strength and cost reduction, while also improving the mechanical strength and durability of the FPC.

CN224521260UActive Publication Date: 2026-07-17湖南易迅达电子有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
湖南易迅达电子有限公司
Filing Date
2025-06-16
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In FPC products, the charging copper pillars are prone to tilting and falling off during soldering, and the FR4 reinforcing plate cannot be tinned from the bottom, resulting in insufficient soldering strength.

Method used

Double-sided copper ring pads are provided on the FR4 reinforcing plate, and an immersion gold layer is deposited on its surface. The copper ring pads penetrate both sides of the reinforcing plate to facilitate welding from the reverse side of the FPC. Combined with glass fiber reinforced epoxy resin material, the mechanical strength is improved.

Benefits of technology

This achieves robustness and reliability in copper pillar welding, reduces production difficulty and costs, and improves the physical strength and durability of FPC.

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Abstract

本实用新型公开了一种带有双面铜环的FR4补强，具体涉及柔性印刷电路板加工技术领域，包括：FR4补强板，所述FR4补强板上设有两个铜环焊盘，两个所述铜环焊盘均贯穿FR4补强板，每个所述铜环焊盘的两端分别位于FR4补强板的正反两面，所述铜环焊盘的表面设有沉金层。本实用新型通过在FR4补强板上设置有铜环焊盘，铜环焊盘的两端分别位于FR4补强板的正反两面，使得焊接时可以从FPC的反面补强上焊接，达到焊接牢固的目的，FR4补强板与铜环焊盘结合，替代原有的软硬结合板设计方案，降低了产品的生产难度，大幅度降低了成本。
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Claims

1. An FR4 reinforcement with double-sided copper rings, characterized in that, include: FR4 reinforcing plate (1), the FR4 reinforcing plate (1) is provided with two copper ring pads (2), both of the copper ring pads (2) penetrate the FR4 reinforcing plate (1), the two ends of each copper ring pad (2) are located on the front and back sides of the FR4 reinforcing plate (1) respectively, and the surface of the copper ring pad (2) is provided with an immersion gold layer.

2. A FR4 reinforcement with double sided copper rings as claimed in claim 1, wherein: The thickness of the FR4 reinforcing plate (1) is 0.30 mm.

3. The FR4 reinforcement with double-sided copper rings according to claim 1, characterized in that: The FR4 reinforcing plate (1) is made of glass fiber reinforced epoxy resin.

4. The FR4 reinforcement with double sided copper ring of claim 1, wherein: The sharp corners of the FR4 reinforcing plate (1) are rounded.