Glass - Page 10

ETNews reports that Samsung decided to postpone its flexible OLED production to 2013, and will use those pilot lines to produce regular glass-based OLEDs. Samsung has to delay flexible OLEDs because of technical issues (low uniformity and slow encapsulation) - but also because they need more OLED capacity because of high demand for larger AMOLED displays.

Samsung Display can currently produce 56,000 5.5-Gen (1300x1500 mmm) glass substrates a month. The pilot lines used for flexible OLED development can produce 8,000 more substrates monthly, bringing the total to 64,000.

Corning's major announcement at SID was the new Willow glass product. This is an ultra-slim (50 um and 100 um) flexible glass that can support backplanes and color filters in both LCD and OLED panels. Willow glass can withstand temperatures up to 500 degrees Celsius, and can be used in roll-to-roll production processes.

Corning says that in the near future Willow glass can be used to produce rigid OLEDs panels in processes that need flexible glass (such as roll-to-roll), and in the long term it may also lead to actual flexible panels based on glass. Glass have several advantages over plastics, mainly that it's a better barrier and it can result in better displays in terms of resolution, backplane speeds, etc. However the major disadvantage is that it can be shattered, unlike plastic-based displays.

Sony has developed a 9.9" 960x540 (111ppi) flexible OLED panel, using an Oxide-TFT (IGZO) backplane and a WOLED-CF architecture (RGBW). The thickness of this panel is only 110 um. To make this panel, Sony used two glass substrates (for the backplane and the color filters) during the production process, which were later removed. This allows Sony to use their regular OLED manufacturing process. We're not sure what kind of material is used as the final substrate.

The small-molecule OLED materials were deposited using vapor deposition. Unfortunately the company didn't demonstrate this panel at SID.

AGC announced that it developed a carrier glass technology that can be used to laminate its 0.1 mm-thick ultra-thin glass on carrier glass. This means that current manufacturing processes can be used with AGC's ultra-thin glass without modification. AGC's ultra-thin glass offers excellent transparency, heat resistance and electrical insulation and is also flexible.

AGC is aiming towards roll-to-roll production methods, which could not use ultra-thin glass until now. The new technology uses a 0.5-mm thick carrier glass laminated on the ultra-thin glass itself. The laminated glass substrate can be handled much the same as an ordinary glass sheet: it protects the glass (from heat, chemical processes and direct contact with processing equipment) and can be easily be removed after processing.

The Holst Centre and Solvay report advances in flexible OLED lighting panels. They present a bendable 69 cm² OLED panel that features 30 lm/W efficiency at 1000 cd/m²:

Back in April 2011 Corning produced a nice video called A Day Made of Glass, showing future designs made with durable, transparent and even flexible glass displays. Now Corning is back with a sequel, showing the same family but with some new ideas in the home, car, classroom, outdoor and work environments:

A lot of these displays can be achieved with OLEDs, although OLEDs aren't specifically mentioned in those video. Just a few days ago Corning announced an OLED glass joint-venture with Samsung. Corning also released an unpacked version of this video- that includes explanations about the technology shown in the video:

Cambrios announces a new CEO and a $5 million investment from Samsung Ventures. Cambrios reveals that they were in close discussions with Samsung for collaboration on "important and valuable" projects over the past several years. Cambrios' first product, ClearOhm is a coating material for plastic or glass that produces a transparent, conductive film by wet processing. Cambrios says that ClearOhm offers significantly higher optical and electrical performance than currently used materials (such as ITO).

ClearOhm can be used in OLED panels, LCDs, e-paper displays and solar panels. Perhaps Samsung wants to use this new material in upcoming OLED panel designs. Cambrios is also collaborating with Plextronics on OLED lighting electrodes.

Corning and Samsung Mobile Display are going to establish a new equity venture for the manufacture of specialty OLED glass substrates in Korea. The new venture will combine Corning's Lotus Glass substrate technology with SMD's OLED display expertise - and will provide product solutions for current and future OLED technologies.

The new venture will produce glasses for all OLED sizes: for small mobile panels to large OLED TV panels. It'll be interested to hear whether this new venture will also develop flexible glass displays, as envisioned in Corning's "Day made of glass" concept video:

Nippon Electric Glass developed a new glass that dramatically reduces glare - from around 8% light reflection in normal glass to only 0.5%. They call it the "invisible glass" - which obviously could be very useful in mobile devices and TVs. NEG used an anti-reflection film on each of the front and back sides of the glass substrate.

Corning launched a new glass called Lotus Glass, which was developed for cutting-edge displays - such as OLEDs and next-gen LCDs (based on LTPS and Oxide-TFTs). Corning explains that the new glass has a high annealing point that delivers the thermal and dimensional stability required by these new high-performance displays. Lotus Glass has already been qualified and is now in production.

Lotus Glass's intrinsic stability means it can withstand the manufacturing thermal cycles better than conventional glass, and so enable tighter design rules needed in advanced backplanes (which are needed for high resolution and fast response time). It's good to see a new glass substrate from Corning, although we're still waiting for Corning's future flexible glass as shown in their "Day made of glass" video released a few months ago (which features future designs made with durable, transparent and even flexible glass displays):