STELLA NEWS SITE is managed by Stella Corporation Inc.

FPD/PCB NEWS～January 26


Dexerials releases anti-reflection film

Dexerials announced that it has commercialized the anti-reflection film “HD Series”. Anti-reflection film “HD Series” has an abrasion durability that has been increased by 40 times or more compared to current products, by forming an anti-smudge layer on the top surface using the vacuum deposition method. Dexerials has commenced shipping while several notebook PC manufacturers have already adopted the product.

FPD/PCB NEWS～January 25


Sumitomo Chemical to Expand Production Capacity for LCP at its Ehime Works

Sumitomo Chemical announced to build additional production lines for its liquid crystal polymer (LCP), which is a super engineering plastic, at its Ehime Works (Niihama city, Ehime, Japan).

In the Sumitomo Chemical Group, LCP is produced at Sumitomo Chemical's Ehime Works and the Harima Works of the Company's subsidiary Taoka Chemical (Harima, Kako-gun, Hyogo, Japan). This expansion will increase the Group's production capacity by approximately 30%. The new production lines are scheduled to be completed in the summer of 2023.

FPD/PCB NEWS～January 21


Japan Display Amicable Settlement with Tianma Microelectronics

Japan Display(JDI) and Panasonic Liquid Crystal Display (PLD) filed a patent infringement lawsuit in the U.S. on August 31, 2020 vis-a-vis Tianma Microelectronics, which led to reciprocal disputes. However, as a result of sincere discussions between the three companies towards dispute resolution, JDI, PLD, and Tianma agreed to an amicable settlement to respect each other's patent rights and withdraw all lawsuits against each other.

As part of this settlement, the three companies have entered into a patent cross-license agreement pursuant to which JDI and PLD will receive license fees from Tianma.

FPD/PCB NEWS～January 20


Toray Creates Negative Photosensitive Polyimide Material that Could Drive Ultrafast Communications

Toray Industries announced that it has developed a negative photosensitive polyimide material. This new offering maintains the characteristic thermal resistance, mechanical properties, and adhesiveness of polyimides while increasing resolutions and enabling high-definition pattern formation on 100 μm and other thick films.

The company developed a negative photosensitive polyimide material that is 100 μm thick and can fabricate vias with 10 μm diameters. The company achieved this by leveraging the functional polyimide design technology it has amassed over the years to enhance light transmittance and control photoreactions.

The company additionally made it possible to cut thermal stress to less than half that of regular polyimide materials and thus reduce warping by controlling polyimide resin cross-linking density from photoreactions during exposure and lowering curing shrinkage.

By the way, prototypes with a view to commercializing the material as a varnish and sheet are shipping.

FPD/PCB NEWS～January 17


Toray Develops Semiconductor Circuits on Film by all Printing Process

Toray Industries announced that it has created a printing technology to form semiconductors circuits on flexible films that employ high-performance semi-conductive carbon nanotube composites. The company also has fabricated radio-frequency identifiers (RFIDs) and sensors on general-purpose films and has demonstrated their wireless operations.

The company engaged in improving materials to lower process temperature and shorten process time, and succeeded in suppressing film stretch and shrink. It additionally applied shape tracking high precision inkjet technology developed by Toray Engineering. Toray thereby established a printing technology to precisely fabricate CMOS and other semiconductor circuits, rectifiers, and memories on film.

Integrating these underlying technologies and antenna enabled Toray to fabricate an RFID on a general-purpose polyester film and communicate wirelessly with UHF band waves. Toray also developed a sensor and demonstrated its wireless water detection. This expands its new technology not only to retailing, logistics and security fields but also to medical and eldercare sites, such as urination detections.