Nippon Electric Glass
A Japanese glass manufacturer focused on flat-panel-display substrates, electronic glass, and specialty glass.
Last updated October 14, 2026
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Overview
Nippon Electric Glass Co., Ltd., commonly known as NEG, is a Japanese glass manufacturer headquartered in Otsu, Shiga Prefecture. The company is best known for producing high-performance glass used in flat-panel displays, particularly glass substrates for liquid-crystal displays. It also has activities in electronic glass, specialty glass, glass tubing, fiberglass, and other technically demanding glass applications. The business developed from a venture established in 1944 with investment from NEC Corporation and other companies. In 1949, it separated from NEC and was established as an independent company under the Nippon Electric Glass name. Its early technical development centered on the automated production of glass tubing. During the 1950s, NEG adopted the Danner process for forming glass tubing and then introduced continuous production using a tank furnace, helping it move from experimental manufacturing toward industrial-scale output. The company subsequently expanded into display-related glass. It began producing black-and-white cathode-ray-tube glass in 1965 and color CRT glass in 1968. These operations connected NEG to the television and display industries, while the company continued to develop other forming and melting technologies. In 1974, it began producing thin sheet glass for liquid-crystal displays, establishing an early position in a market that later became central to its identity. NEG became publicly traded in Japan in 1973, when its shares were listed on the Second Section of both the Tokyo Stock Exchange and the Osaka Securities Exchange. The shares later moved to the First Section of those exchanges in 1983. The company is listed on the Tokyo Stock Exchange and is identified as a constituent of the Nikkei 225 index. Its international expansion included a 1988 joint venture with O-I Glass for CRT-glass operations in the United States. That business operated under the Techneglas name. NEG later ended CRT-glass production in the United States and Mexico in 2004, reflecting the changing economics and technology of display manufacturing. The company also entered plasma-display-panel materials, beginning production of PDP substrate glass using the float process in 1998, and began producing LCD substrate glass using the overflow process in 1999. Display glass remains the company’s most prominent business area. NEG is described as having approximately 20 percent of worldwide LCD glass-substrate production, although the exact share can vary by period and measurement basis. The company’s manufacturing portfolio also includes glass for electronics and specialty applications, where properties such as dimensional stability, optical quality, heat resistance, chemical durability, and controlled composition are important. Beyond displays, NEG began producing substrate glass for solar cells in 2010. In 2017, it acquired three major fiberglass factories from PPG, including the large facility in Shelby, North Carolina, United States. This transaction broadened the company’s international fiberglass manufacturing footprint and added scale to a business distinct from its display-glass operations. NEG’s history therefore follows the development of several generations of glass technology: tubing, CRT glass, thin sheet and display substrates, plasma-display materials, solar-cell substrates, and fiberglass. Its present positioning is that of a specialized industrial materials company supplying glass components and materials to electronics, display, construction, energy, and other technical markets. The company continues to operate as an independent Japanese listed manufacturer with global production and customer relationships.
History
Nippon Electric Glass traces its origins to 1944, when a glass enterprise was established with investment from NEC Corporation and other companies. In 1949, the enterprise separated from NEC and became Nippon Electric Glass as an independent company. This separation provided the foundation for NEG’s later development as a dedicated glass-technology manufacturer rather than a business embedded within a telecommunications group. During its first major phase, NEG concentrated on glass tubing and the development of production technology. In 1951, it successfully introduced the Danner process for automatically forming glass tubing and began mass production. Five years later, it started continuous glass-tubing production using a tank furnace. These steps established capabilities in controlled melting, forming, and continuous manufacturing that became relevant to later product categories. The company entered display materials during the expansion of television technology. It began manufacturing black-and-white CRT glass in 1965 and color CRT glass in 1968. NEG’s public-market history began in 1973, when its stock was listed on the Second Section of the Tokyo Stock Exchange and Osaka Securities Exchange. The stock transferred to the First Section of both exchanges in 1983. NEG began producing thin sheet glass for LCD applications in 1974. As flat-panel displays gradually developed, the company expanded its display-materials technology. In 1988, it entered CRT-glass operations in the United States through a joint venture with O-I Glass called Techneglas. In 1998, it began producing plasma-display-panel substrate glass using the float process. In 1999, it began manufacturing LCD substrate glass using the overflow process, a forming method suited to producing large, high-quality sheets for display applications. The same year, all of the company’s plants in Japan obtained ISO 14001 certification according to the cited historical account. The transition away from CRT technology affected NEG’s international display operations. CRT-glass production in the United States and Mexico ended in 2004. The company’s later display strategy centered more strongly on LCD substrates and other flat-panel-display materials. NEG is associated with a substantial share of global LCD glass-substrate production and is described in the reference material as holding about 20 percent of worldwide output. NEG diversified beyond display glass during the following decade. In 2010, it began producing substrate glass for solar cells. In 2017, it acquired three of PPG’s largest fiberglass factories, including the Shelby, North Carolina, facility in the United States. The acquisition strengthened NEG’s fiberglass manufacturing presence and expanded its international industrial-glass footprint. Across these stages, NEG moved from glass tubing into CRT materials, LCD and plasma-display substrates, solar-cell materials, fiberglass, and other electronic and specialty-glass applications. Its history reflects the company’s repeated adaptation to changes in display technology and industrial demand. It remains a Japan-based, publicly listed glass manufacturer whose business combines specialized materials, process engineering, and international production.
- 2017
Fiberglass-factory acquisition
[1]NEG acquired three major fiberglass factories from PPG, including the Shelby, North Carolina, facility.
- 2010
Solar-cell substrate glass
[1]NEG began producing substrate glass for solar cells.
- 2004
End of U.S. and Mexican CRT production
[1]CRT-glass production in the United States and Mexico was discontinued.
- 1999
LCD overflow-process production
[1]NEG began producing LCD substrate glass with the overflow process and obtained ISO 14001 certification for all plants in Japan.
- 1998
PDP substrate glass
[1]The company started producing plasma-display-panel substrate glass using the float process.
- 1988
U.S. CRT-glass joint venture
[1]NEG began CRT-glass operations in the United States through the Techneglas joint venture with O-I Glass.
- 1983
Transfer to the First Section
[1]The company’s shares transferred to the First Section of the Tokyo and Osaka exchanges.
- 1974
Thin glass for LCDs
[1]NEG began producing thin sheet glass for liquid-crystal displays.
- 1973
Public listing
[1]NEG shares were listed on the Second Section of the Tokyo Stock Exchange and Osaka Securities Exchange.
- 1968
Color CRT glass
[1]The company began production of glass for color cathode-ray tubes.
Products and positioning
A global specialist in technically demanding glass materials, with particular strength in flat-panel-display substrates and electronic glass.
Display glass · 1974
LCD glass substrates
Thin, highly controlled glass sheets used as substrates in liquid-crystal display panels. NEG entered thin-sheet LCD glass in 1974 and later introduced production using the overflow process. The product line is central to the company’s position in flat-panel-display materials and is associated with a significant share of global LCD glass-substrate production.
Display glass · 1965
CRT glass
Glass components for cathode-ray-tube displays. NEG began with black-and-white CRT glass in 1965 and added color CRT glass in 1968. The company later operated CRT-glass activities in the United States through Techneglas, but its U.S. and Mexican CRT production ended in 2004 as display technology shifted toward flat panels.
Display glass · 1998
PDP substrate glass
Glass substrates for plasma-display panels, produced using the float process. NEG entered this category in 1998 as plasma displays developed as an alternative flat-panel technology. The product represents an earlier phase of the company’s flat-panel-display history.
Industrial glass · 1951
Glass tubing
Glass tubes manufactured through controlled forming and continuous-furnace processes. NEG’s early industrial development was strongly associated with glass tubing: it applied the Danner process in 1951 and began continuous tank-furnace production in 1956.
Energy glass · 2010
Solar-cell substrate glass
Substrate glass for solar-cell applications. NEG began production in 2010 as part of its expansion beyond display materials into energy-related glass products.
Reinforcement glass · 2017
Fiberglass
Glass-fiber products made for industrial and reinforcement applications. NEG expanded its fiberglass manufacturing footprint in 2017 by acquiring three major fiberglass factories from PPG, including the Shelby, North Carolina, plant in the United States.
Specialty glass
Electronic and specialty glass
Specialized glass materials for electronics and other technical uses. These products rely on controlled optical, thermal, chemical, and dimensional properties. The category complements NEG’s display-substrate business and represents the broader technical-glass capabilities developed through its manufacturing history.
Brand decisions
2017
Acquisition of PPG fiberglass factoriesM&ABackground
NEG sought to expand its international fiberglass manufacturing capabilities and broaden its industrial-glass portfolio.
Action taken
The company acquired three of PPG’s largest fiberglass factories, including the Shelby, North Carolina, facility.
Aftermath
The transaction increased NEG’s fiberglass production footprint in the United States and internationally.
1999
LCD substrate production using the overflow processProduct launchBackground
Flat-panel displays were creating demand for large, thin, high-quality glass substrates.
Action taken
NEG began producing LCD substrate glass using the overflow process.
Aftermath
LCD glass substrates became a defining part of NEG’s display-materials business.
1988
International expansion through TechneglasStrategyBackground
CRT displays were an important market for television and electronic equipment, and NEG was expanding its glass operations beyond Japan.
Action taken
NEG established CRT-glass operations in the United States through a joint venture with O-I Glass under the Techneglas name.
Aftermath
The operations later ended CRT-glass production in the United States and Mexico in 2004 as the display market moved away from cathode-ray tubes.
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