PI film gold foil | Key process for precision packaging of electronic components

Introduction

In the field of precision packaging of modern high-end electronic components, achieving high fidelity signal transmission, long-term reliability, and resistance to harsh environmental interference are the core challenges. Among them, the PI film (polyimide film) gold foil process of Advanced Institute Technology, as a key basic material technology, has become the "golden armor" to solve these problems with its unique performance combination. It is not simply a combination of materials, but a superb technique that combines materials science and precision manufacturing.

1、 PI film substrate: excellent flexible platform

Polyimide film is the cornerstone of this composite material. It itself has extremely excellent comprehensive performance: extremely high heat resistance (long-term working temperature exceeding 250 ℃), excellent electrical insulation properties, outstanding mechanical strength and creep resistance, extremely low moisture absorption, and excellent chemical stability. These characteristics enable it to provide a flexible carrier for precision circuits that is dimensionally stable, sturdy, durable, and insulated reliably, adapting to the narrow space and possible deformations inside the package.

2、 Gold foil coating: perfect functional interface

The gold layer deposited on the PI film plays a crucial functional role. Gold is an excellent electrical conductor that ensures low loss and high fidelity in signal transmission; It has extremely stable chemical properties and never oxidizes or corrodes, ensuring the conductivity reliability of the connection interface under long-term use; Gold also has excellent solderability and bonding properties, which can form strong and low resistance connections with chips, wires, or other components. This thin layer of gold is the core of achieving electrical interconnection functions.

3、 Precision Composite: The Core Essence of Craftsmanship

The perfect combination of organic polymer films with vastly different properties and metallic gold is the key to the success or failure of the process. This process typically involves precise surface treatment (such as plasma cleaning to activate the PI surface), deposition of extremely thin metal seed layers (such as chromium, nickel chromium alloys, etc.) through sputtering or vapor deposition to provide a strong adhesion foundation, and finally precise control of the thickness and density of the gold layer through electroplating technology. The entire process requires a super clean environment to ensure that the coating is defect free, pollution-free, and has strong adhesion with the base film, avoiding peeling during subsequent processing or use.

Summary

In conclusion,Advanced Institute (Shenzhen) Technology Co., LtdofPI gold-plated filmCraftsmanship is a crucial electronic packaging technology. It cleverly utilizes PI film as a flexible, insulating, and heat-resistant structural substrate, while endowing it with ultra-high conductivity, stability, and interconnectivity achieved through gold plating. This composite material, which combines rigidity and flexibility, is like building a "golden channel" for precision circuits, ensuring smooth signals and long-lasting and reliable connections. It is an indispensable core material and process for achieving precision packaging in high-end chips, sensors, aerospace, military electronics and other fields.