Category

Area

  1. Global
  2. Asia & Oceania
  3. China & North Asia
  4. Europe & CIS
  5. Latin America
  6. Middle East & Africa
  7. North America

Panasonic Key Technologies

The Wonder of Smartphones That Do Not Become Hot

Apr 03, 2012

Smartphones and smart tablets are very convenient tools that provide easy access to information wherever you are and whenever you need it. They also offer intuitive operation. Smartphones that fit in the palm of your hand can do things that personal computers couldn't do until recently.

Do you know that Panasonic's devices are inside smartphones? This series show you the "Inside Panasonic" to support smartphones!

Personal computers require highly functional CPUs. These CPUs must be cooled. Desktop and laptop PCs use fans to cool the CPU with air. If the fans do not operate properly, then the personal computer will stop functioning. Smartphones and smart tablets also contain CPUs, as well as many other components that generate heat, such as batteries, communication units, and cameras. However, a smartphone has no ventilation holes. You can use a smartphone while holding it because no part of the smartphone becomes extremely hot.

You can hold a smartphone without feeling it hot, because the circuits inside the smartphone are covered with special thermal diffusion sheets. These thermal diffusion sheets, the primary component of which is carbon, have excellent thermal diffusion characteristics -- much better than those of copper, which has high thermal diffusion characteristics and has been used for radiating heat.

What is Pyrolytic Graphite Sheet (PGS)

  • 01_graphite.jpg
    Schematic Structure of the Graphite Sheet

This sheet is only several 10 μm thick. It looks like a single sheet, but actually consists of several tens of thousands of layers of highly conductive carbon crystal membranes. The carbon in each membrane is closely bonded with each other in a plane. The membranes convert heat into vibration energy and very quickly diffuse it.

As a result, when a carbon crystal membrane is heated, it diffuses the heat very quickly. Therefore, a graphite sheet made of carbon crystal membranes thoroughly diffuses and radiates heat even if its thickness is several 10 μm.

Structure of Pyrolytic Graphite Sheet (PGS)

Each sheet is made by steaming high-polymer films under very high temperature. Since the carbon is closely bonded, the sheet is very strong and does not break even when flexed 30,000 times (R5/180°). Therefore, it provides excellent thermal diffusion characteristics in a limited space that has folds, bends, and differences in level. It also has high electric field-shielding characteristics.

Thanks to these excellent characteristics, smartphones do not become hot when their size and thickness are reduced. Panasonic components and devices are used in these fields.

Activity of "Graphite sheet" inside Smartphone

Product Infomation:
PGS Graphite Sheet Lineup English | Chinese | Japanese

Related Links:

Technology/R&D News

Developing Eco-conscious Materials to Realize Circular Manufacturing Faster

Oct 23, 2020

Panasonic Quality Air for Life Solution in Malaysia

Oct 21, 2020

Preventing Illness with Futuristic IoT Toilets

Oct 20, 2020

News Feeds

RSS Feeds

The content in this website is accurate at the time of publication but may be subject to change without notice. Please note therefore that these documents may not always contain the most up-to-date information.

Copy and paste this code.

x