Key Takeaways
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Your phone can process a payment and your factory can control a motor because of the same material science, so what are semiconductors? They are are materials whose electrical conductivity falls between a conductor, such as copper, and an insulator, such as glass. Engineers use their controllable electrical properties to build devices that switch current, amplify signals, detect light, and process information.
These materials support everything from small control boards to high-power conversion equipment. The National Science Foundation has supported research in this field since the 1950s, including work by more than 10 Nobel laureates. That research helped advance computing, lighting, communications, and medical imaging.
At Summit Electronics, we connect that technology with the parts your business needs. As a Boca Raton electronic components supplier and global distributor and sales agent, we support current, allocated, hard-to-find, and obsolete component orders.
With over 2 million parts in stock and a worldwide distribution network, we serve production teams, purchasing departments, and maintenance professionals.
How Semiconductor Materials Control Electrical Current
Electrical conductivity describes how easily current flows through a material. Metals have many mobile electrons that carry current. Insulating materials strongly restrict that movement.
Engineers control conductivity by changing a material’s composition and applying electrical fields. Light and temperature also affect its electrical behavior. These properties make precise electronic control possible.
Doping introduces a controlled amount of selected impurity atoms into a crystal. In silicon, this creates two useful material types:
- N-type: Phosphorus or arsenic adds mobile electrons that carry current.
- P-type: Boron creates holes, which represent missing electrons and act as positive charge carriers.
N-type and P-type describe the dominant charge carriers. They do not mean that the entire material has a negative or positive electrical charge.
Joining P-type and N-type regions creates a P-N junction. Its internal electric field controls the movement of charge carriers. Applying voltage changes how that junction conducts, enabling rectification, switching, and light emission.
Core Semiconductor Materials
Silicon is the most widely used elemental material for electronic chips. Other materials provide electrical and optical properties suited to specific operating requirements.
Elemental materials contain one chemical element. Compound materials contain two or more elements. This distinction describes their composition, while intrinsic and extrinsic describe their doping condition.
Silicon (Si) supports processors, memory, control chips, solar cells, and power switching through established manufacturing methods and its useful insulating oxide.
Germanium (Ge) offers high carrier mobility and infrared sensitivity, supporting infrared detection and silicon-germanium high-speed electronics.
Gallium arsenide (GaAs) provides high electron mobility and properties suited to light emission, making it useful for RF amplification, satellite communications, LEDs, and lasers.
Gallium nitride (GaN) has a wide bandgap that supports fast switching and high electric fields in compact power converters, RF amplifiers, and lighting.
Silicon carbide (SiC) also has a wide bandgap, supporting high-voltage and high-temperature operation in industrial inverters, electric vehicle power systems, and energy conversion.
Indium phosphide (InP) supports high-speed electronics and optical communications through optical transmitters, photodetectors, and high-frequency circuits.
Material choice affects switching speed, voltage capability, heat management, and light response. Selecting the correct device requires its datasheet and application requirements. The base material alone does not establish compatibility.
Types of Electronic Components Made From These Materials
Electronic parts made from semiconductors are called devices. A discrete component performs an individual electronic function. A chip combines multiple functional elements in one structure.
Diodes
A rectifier diode conducts readily in its forward direction and restricts reverse current within its rated limits. Rectifier types convert alternating current into direct current.
A Zener diode operates in a specified reverse breakdown region to support voltage regulation or protection. An LED emits light when forward current flows through it.
These components switch or amplify electrical signals. A bipolar junction transistor uses base current to control collector current. A MOSFET uses gate voltage to control conduction through a channel.
BJTs serve signal amplification and switching applications. MOSFETs support power conversion and electronic switching. IGBTs combine an insulated gate with bipolar conduction for demanding power-control applications.
Integrated circuits combine interconnected electronic elements on a chip. Complexity ranges from a small logic function to a processor containing billions of switching elements. Not every chip contains every type of circuit element.
Major categories include:
- Microprocessors: Execute program instructions and calculations.
- Microcontrollers: Combine processing, memory, and interfaces for embedded control.
- Memory chips: Store working data or retain information without power.
- Logic chips: Perform Boolean operations, counting, sequencing, and signal selection.
- Analog chips: Amplify signals, regulate voltage, and interface with physical measurements.
Optoelectronic devices
These components interact with light. LEDs and laser emitters convert electrical energy into light. Photodetectors convert incoming light into an electrical response, while photovoltaic cells generate electrical power.
Engineers use optoelectronic devices in optical communications, isolation circuits, machine vision, indicators, and solar generation.
Sensors
These devices detect physical conditions and produce usable electrical signals. Examples include temperature measurement chips, Hall-effect magnetic detectors, and silicon pressure measurement devices.
The sensing element and supporting electronics work together. Their output gives a controller information about equipment conditions.
Actuators
These devices turn energy into physical movement. Motors, solenoids, and electrically controlled valves are examples. Their mechanical function differs from the electronic driver that controls their operation.
Chip-based microelectromechanical systems also perform actuation. A motor driver chip controls a motor, but it does not perform the motor’s mechanical work.
Where These Devices Work in Industrial Equipment and Consumer Electronics
Electronic systems combine measurement, processing, and power control to perform useful work. A failed component can interrupt that sequence even when the surrounding equipment remains serviceable.
- Robotics and automation: In robotics and automation systems, sensors report position, temperature, and movement. Controllers process that information. Driver circuits command actuators to move a robot arm, open a valve, or position a tool.
- Aerospace: Aerospace electronic assemblies use processing, power management, and communication devices in flight instruments, monitoring systems, and onboard controls. Replacement decisions must account for qualification, operating temperature, and approved equipment requirements.
- Military equipment: Military electronic systems use RF amplification, signal processing, and power-control components in communications, radar, and support equipment. Long service lives make exact part identification and documentation central to repair purchasing.
- Energy and industrial power: Power generation equipment uses switching devices and controlled rectifiers to manage electrical energy. Thyristors, including SCRs and TRIACs, control loads in rectifiers, soft starters, and heating systems. A standard SCR latches on after triggering and remains conducting until current falls below its holding level.
- Consumer electronics: Consumer electronics assemblies use integrated circuits for processing, memory, audio, and power management. Phones, televisions, gaming consoles, and household appliances depend on these functions for everyday operation.
Maintenance, repair, and operations teams face the same purchasing challenge across these markets: locate the correct replacement without changing the equipment’s required performance.
What to Check Before Ordering a Replacement Part
Matching a package shape or a partial marking does not establish electrical compatibility. Two parts can fit the same board footprint and have different pin assignments, ratings, or switching behavior.
Before requesting a quote, document:
- Manufacturer and complete part number: Include every suffix and ordering code.
- Package and pinout: Confirm dimensions, mounting type, terminal count, and electrical connections.
- Electrical ratings: Compare voltage, current, power dissipation, timing, and switching requirements.
- Operating conditions: Specify temperature range, qualification grade, and heat-removal requirements.
- Condition and documentation: Define acceptable date codes, traceability, packaging, and testing.
- Quantity and delivery date: Identify the required order volume and repair or production deadline.
For sourcing after OEM support ends, an engineering-approved replacement matters as much as availability. A cross-reference identifies a candidate. It does not approve that candidate for your equipment.
Summit Electronics helps you locate current and legacy parts through our inventory and worldwide purchasing network. Give us the complete requirement so we can focus the search on parts that meet your order specifications.
Get the Parts You Need for Production and Repairs
Our company history began in 1961, establishing a commitment to efficient, personal service. In 2026, that represents 65 years of experience connecting buyers with electronic parts.
As your electronic components supplier, we combine local support in Boca Raton with global sourcing. Our inventory covers power devices, chips, switches, capacitors, electron tubes, rectifiers, SCRs, relays, and voltage regulators. We support new production and legacy repairs with responsive service, fast delivery, and competitive pricing.
Call Summit Electronics to discuss your order. Have your part numbers, quantities, and required delivery dates ready, or request a quote with your specifications.
Click here or call us toll-free at (800) 226-6960.
