Product Primer

Product Primer

Anisotropic Conductive Film (ACF) <ANISOLM>

[Summary]

ACF is a cutting-edge invention of Hitachi Chemical for microscopic circuit connection. Conductive particles distributed in insulating adhesive film connect bumps/electrodes on IC chip/FPC, and electrodes on glass/FPC/PWB. ACF is used widely in the world for flat panel display (FPD) devices; and enables evolution of FPD applications, such as PCs, mobile phones, LCD TVs, moreover various electronic devices.

[Structure]

It is the product which consisted of the thermosetting adhesive film and support film which scattered conductive particles.

[Method of Use]

Typically used as follows in the interconnection of FPC and LCD panel electrodes:
1) Prelaminate the ACF film with support film on the LCD panel electrodes.
2) Remove the support film.
3) Align FPC with LCD panel electrodes and apply pressure for 5-15 seconds at 140-210C°. This allows LCD panel electrodes and FPC to be electrically connected with the help of the conductive particles while preserving the insulation of adjacent electrodes and circuits.

Concept of Interconnection Using ACF
between Electrodes and Circuits

*It is also used for connection with a PWB and FPC.

[Features and Strengths of Hitachi Chemical's Products]

In 1984, Hitachi Chemical became the first company in the world to commercialize ACF with metallic particles distributed in an adhesive film. Using the know-how accumulated since that time, as well as resin design and synthesis technologies, film structural design technologies and reliability evaluation technologies, Hitachi Chemical has been able to provide optimal solutions to meet customers' needs.

[Market Share and Rank (company estimate)]

World market share: Approximately 60%
Rank: No.1

[Manufacturing Bases]

Coating and cutting:

Hitachi Chemical Co., Ltd., Shimodate Works (Goshomiya) and Shimodate Works (Minami-yuki)

cutting:

Hitachi Chemical (Shanghai) Co., Ltd.