The capacity to develop and produce compound, wide-bandgap and power semiconductors, the device families that carry power electronics, radio frequency and extreme environments.
The Capability Development Index tracks the events that move a capability — operational use, technical breakthroughs, procurement decisions and the industrial base behind them — and places each on the record with the date it happened.
Recent developments cover the current period. Historical developments are the inflection points that produced Compound & Power Semiconductors as it stands today.
The American inventor developed an electric furnace method to make carborundum as an industrial abrasive, unintentionally creating the material that decades later became the first wide-bandgap semiconductor put to electronic use.
The British engineer's laboratory notebook recorded light emission from a carborundum crystal under electric current, the first documented observation of the effect underlying today's compound-semiconductor optoelectronics.
Working in the Soviet Union, the self-taught researcher documented light emission from silicon carbide crystals under electric current in detail, work later recognised as pioneering the light-emitting diode decades before the term existed.
Early samples of the compound could be produced but not grown as usable crystals, leaving gallium nitride a laboratory curiosity for half a century before crystal-growth methods caught up with its potential.
Sustained large-scale investment in conventional semiconductors such as silicon from the 1970s onward meant that research and development of wide-bandgap materials fell well behind. This investment gap shaped the later trajectory of wide-bandgap technology, which only attracted broader interest as conventional transistor density approached a plateau and the advantages of higher power density became compelling.
The Japanese researchers grew high-quality gallium nitride on sapphire and found a way to make it p-type, overcoming obstacles that had stalled gallium nitride devices for two decades and enabling the diodes and transistors that followed.
The Japanese engineer's device solved the last missing colour needed for practical white lighting, building on earlier crystal-growth breakthroughs, and turned gallium nitride from a research material into a global lighting and display industry.
The German firm brought to market a power diode built from silicon carbide rather than silicon, offering faster switching and lower losses, marking the material's entry into mainstream power electronics manufacturing.
The US firm commercialised gallium nitride field-effect transistors for power conversion rather than radio-frequency or lighting use, opening a new application for a material previously associated mainly with LEDs and radar amplifiers.
Designating silicon carbide and gallium nitride a priority sector directed state funding toward domestic substrate and device producers, part of a broader effort to reduce reliance on imported compound-semiconductor technology.
The car was the first mass-market electric vehicle to replace silicon power switches with silicon carbide devices, supplied by STMicroelectronics, cutting inverter energy losses and prompting rapid adoption across the electric vehicle industry.
The compound semiconductor foundry added capacity for gallium nitride radio-frequency devices used in telecoms base stations and radar systems, responding to sustained demand from network operators and defence customers.
Government support originally aimed at conventional silicon fabrication was widened to cover silicon carbide and other compound semiconductor manufacturing, part of a broader effort to diversify India's nascent chip industry beyond a single material.
The South Korean firm built on its earlier acquisition of a US silicon carbide wafer business to grow output for electric vehicle and industrial power electronics customers, expanding capacity on both sides of the Pacific.
State and industry media pointed to wider use of gallium nitride active electronically scanned array radars in fire-control and early-warning systems, part of a broader multi-year modernisation of Chinese military sensors.
Firms including Tianyue Advanced Materials and SICC added wafer capacity and narrowed the quality gap with established Western suppliers, adding to global oversupply pressure that pushed down substrate prices.
The largest US silicon carbide substrate producer restructured its debt through bankruptcy proceedings after a prolonged slide in its share price, while continuing to operate its plants and supply automotive and industrial customers.
Rising power demand from AI processors pushed hyperscale operators to explore higher-voltage direct current distribution, an architecture that depends on silicon carbide and gallium nitride switches to cut conversion losses at the scale involved.
The Japanese firm continued work on gallium oxide, an ultrawide bandgap material capable of higher breakdown voltages than silicon carbide, as researchers and manufacturers explored its potential for next-generation power devices.
The European and Chinese companies progressed construction of an 8-inch silicon carbide device facility in China, a joint venture allowing STMicroelectronics to serve the Chinese market while localising part of its supply chain.
The German company brought its Kulim module 2 facility toward volume production, adding substrate and device capacity outside Europe to meet demand from automotive and industrial power electronics customers.