Glossary - FPD and Film Manufacturing
A
- Alignment layer
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Category: Applications
This is an extremely thin film with liquid crystal elements arranged in a certain direction. It is an essential material for LCD.
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B
- Batch processing
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Category: Equipment-related
This is a method of processing multiple wafers, glass substrates, or other products together in a cassette or on a rack. It is suitable for producing few items in large quantities. To ensure uniformity in batches, it is necessary to use a technology that maintains uniform gas and temperature distribution within the heating chamber.
C
- Clean oven
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Category: Equipment-related
This is an oven that traps and filters out airborne dust and other substances. Because the air circulating inside the chamber where heat treatment is performed has passed through a filter, heat treatment can be performed in a clean environment.
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- Color filter
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Category: Applications
These filters are used to display the colors of an image or video. When light passes through a color filter, it is given color information. These are used in FPD and in the image sensors of smartphones and digital cameras.
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- Color resist
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Category: Applications
This is the ink of the pigment base used in a color filter. There are three colors: R (red), G (green), and B (blue). In the color filter production process, the unnecessary parts of the resist applied to a glass substrate are removed by exposure and developing, and the resist is then baked to cure it.
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F
- FPD
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Category: Applications
FPD is an acronym for Flat Panel Display. It is a general term applying to thin, flat displays. These include displays for smartphones, PCs, televisions, and other devices, plasma displays, organic EL displays, FED (Field Emission Displays), and electronic paper.
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H
- Heat recovery equipment /
Heat reuse unit -
Category: Equipment-related
This equipment includes a heat exchange system that uses waste heat from the heating equipment to preheat the air that is injected into the heating equipment. By using waste heat, it is possible to reduce energy consumption.
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I
- IGZO
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Category: Applications
This is a crystalline oxide semiconductor that is created by oxidizing indium (In), gallium (Ga), and zinc (Zn). It is a thin, nearly transparent film that allows the production of high-precision, and low energy consumption LCD panels.
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- IR heating
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Category: Equipment-related
This is a heating method that uses far-infrared rays that have superior heating efficiency.
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L
- LCD
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Category: Applications
LCD is an acronym for Liquid Crystal Display. It is a display that uses liquid crystal in the display equipment.
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- LCD cell
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Category: Applications
A LCD cell consists of a TFT array substrate and color filter substrate that are attached to one another, with the space between them filled with liquid crystal.
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- LTPS
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Category: Applications
LTPS is an acronym for Low Temperature Polysilicon. TFT are divided into amorphous (non-crystalline) silicon and poly (polycrystalline) silicon according to the crystal structure of the semiconductor (silicon). It is used in smartphones and other devices because polysilicon provides a faster liquid crystal reaction speed compared to amorphous silicon, and because the LCD panels which use it feature high precision and low power consumption.
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M
- Micro LED
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Category: Applications
This is a LED (light-emitting diode) with a diameter of 100 µm (micrometers) or less.
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- Micro LED display
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Category: Applications
This is a display that was created using micro LED. It can display images that are brighter and higher-quality than OLED. It is expected that these will be used in the displays of wearable devices.
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- Mini LED
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Category: Applications
This is a LED (light-emitting diode) with a diameter of 100 to 200 µm (micrometers).
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- Mini LED display
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Category: Applications
This is a display that was created using mini LED.
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O
- OLED
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Category: Applications
OLED is an acronym for Organic Light-Emitting Diode, and is a type of light-emitting diode that uses organic compounds in the material. OLED elements have the property of emitting light when electrical current is applied to them.
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- OLED display
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Category: Applications
This is a display that uses OLED. Because the OLED elements themselves emit light, a backlight is not necessary as it is with a liquid-crystal display (LCD), allowing the display to be made thinner.
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- Oven
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Category: Equipment-related
A general term for heat treatment equipment. In our equipment, it refers to hot air circulation-type heating equipment.
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P
- Passivation film
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Category: Applications
This is a film that protects a semiconductor element from dust and moisture.
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S
- Single wafer processing /
Single Substrate processing -
Category: Equipment-related
This is a method of processing one wafer, glass substrate, film, or other product at a time. It is suitable for lines that produce small quantities of many kinds of products in a short period of time. Also, since substrates are processed one by one, detailed control is possible. In processes requiring rapid temperature rise and fine atmosphere control, single wafer processing is required even on batch lines.
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- Sublimate / Sublimation
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Category: Process
During the manufacturing process for color filters, a variety of gases are produced from the color resist. When these gases form sublimates in low-temperature zones, they can cause particle contamination of treated products and result in reduced yield. As a result, countermeasures to reduce the amount of sublimate leakage are necessary. Our single substrate transfer type clean oven already include countermeasures to sublimates, and can be used without problems even for treatments that generate sublimates.
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T
- TFT
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Category: Applications
TFT is an acronym for Thin Film Transistor. These films transmit light and are used to control the elements which compose each dot of an LCD. The display image is created by making each of the individual pixels brighter or darker, and the transistor acts as a switch which does exactly that.
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- TFT array
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Category: Applications
This is a substrate that contains switching circuits for driving a LCD.
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- TFT liquid crystal
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Category: Applications
This is one LCD panel type. It consists of finely processed transistors several μm in size that are organized in a precise pattern on a glass substrate. The display image is created by making each of the individual pixels brighter or darker, and the transistor acts as a switch which does exactly that.
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