A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Strictly speaking, a semiconductor is a material with an electrical conductivity between that of an insulator and that of a conductor. Semiconductors can be single elements such as silicon or germanium or compounds such as gallium arsenide or indium phosphide. In day to day usage, however, the term "semiconductor" more frequently refers to the components manufactured from semiconductor materials.
- R
Roentgen
- R1
One of the buildings at the Agrate plant in Italy (extension of the 8" wafer fab).
- R&A
Responsibility and Authority
- R/B
Ready Busy
- R&D
Research and Development
- R&R
Reproduction and Repeatability
- R/W
Read/Write
- RA
1) Risk Analysis
2) Risk Assessment
A probabilistic study of the magnitude of harm to human health or the environment associated with a physical or chemical agent, activity, or occurrence. The assessment involves estimates of the types, quantities, and locations of the release of harmful substances or energy; a dose response evaluation linking exposure to possible levels of harm; a characterization of the exposure of humans, wildlife, or ecosystem components to the release; and a summary using the foregoing analysis to produce the overall risk assessment. The final step is also known as risk characterization.
- RACE
Research & development of Advanced Communications in Europe
- RACM
Reasonably Available Control Measures
- RACT
Reasonably Available Control Technology
- RAD
Radiation Absorbed Dose
(Unit of measurement of radiation absorbed by humans)
- RADAR
Radio Detection And Ranging
- Radon
A radioactive element. The element is a chemically inert gas that is produced from the radioactive decay of radium, which in turn is created by the radioactive decay of uranium. As such, radon is found naturally in certain geological formations such as granite where uranium can occur naturally.
- Radioactivity
The property exhibited by certain unstable elements of spontaneously emitting mass or energy from the nucleus.
- RAFE
Radio Analog Front End
- RALU
Resistor and Arithmetic/Logic unit
- RAM
Random Access Memory
Early computer memories generally had serial access. Memories where any given address can be accessed when desired were then called "random access" to distinguish them from the memories where contents can only be accessed in a fixed order. The term is used today for volatile random-access semiconductor memories.
- Rancho Bernardo
Location of ST plant near San Diego in southern California (USA).
- Random
Lack of predictability, without any systematic pattern.
- Rapid Thermal
The use of radiant light energy to heat silicon wafers very rapidly to elevated temperatures.
- RAS
Row Address Strobe
- Rawline
Assembled parts, which have not undergone final test yet.
- RBDS
Radio Broadcast Data System
US version of the Radio Data System.
- RC
1) Remote Control
2) Radio Control
3) Resistor-Capacitor
- RCA Clean
A special wet chemical cleaning process using a combination of water, peroxide, and ammonium hydroxide followed by water, peroxide, and hydrochloric acid.
- RCCP
Rough Cut Capacity Plan
A plan using simplified capacity constraint to check feasibility of the plan.
- RCD
Resistance Capacitance Diode
- RCRA
Resource Conservation and Recovery Act
- RCTL
Resistor Capacitor Transistor Logic
- RCV
ReCeiVe
- RD
1) Receive Data /ReaD
2) Requested Date The delivery date requested by the customer.
- RDA
Recommended Daily Allowance
- RDF
Refuse Derived Fuel
An energy resource produced by the separation of combustible materials (refuse) from municipal solid waste. This material is then combined with coal and burnt as a refuse-derived fuel, which is usually 5 to 25 percent refuse.
- RDI
Reference Daily Intake
- RDNA
Recombinant DNA
- RD/RA
Remedial Design/Remedial Action
- RDS
Radio Data System
- RDT
Resistance Temperature Detector
- RDV
1) Reference Dose Values
2) Rendez Vous
- RDY
ReaDY
Reactor
A term used to describe a piece of semiconductor process equipment used for depositing various layers.
Receptor
A person, plant or animal that is exposed to a chemical or physical agent released to the environment by human activities.
Reclamation
Restoring land to the natural state following its destruction by some human activity such as surface mining. The original contour of the land is restored as much as is feasible, topsoil and fertilizer are applied, and vegetation native to the region is planted.
Recycling
The process by which recovered materials are transformed into new products.
- Refractory Metal
A metal that has high temperature stability. Generally refers to those metals in the Periodic Groups of IVA, VA, and VIA.
- REGI
Registration - for design win parts.
- Register
A special circuit in a CPU, such as an accumulator or program counter that can either hold a value or perform some arithmetical or logical operation.
- Registration Overlay
The accuracy of position of all patterns with respect to previous patterns that form other layers of a semiconductor wafer.
- Relay
An electromagnetic switching device
- RELIS
REliability Information System
- REM
Roentgen Equivalent Man
- Renewable energy
A source of energy that is replenished by natural phenomena, such as firewood or the water held behind by a dam used for hydroelectrical purposes. Conversely, fossil fuels are a non-renewable source of energy.
- Resistance
The difficulty in moving electrical current through a conductor to which voltage is applied. Expressed in ohms.
- Resistivity
A physical property of a material to resist or oppose the movement of charge through the material. Expressed in ohm-cm.
- Resistor
An electronic component that impedes the flow of current in an electronic circuit.
- Resolution
The smallest image that can be clearly discerned.
- Responsible Care
A code of good environmental practice first formulated by the Canadian Producers Association in 1984. Members of the Association could voluntarily commit themselves to following the code and publicize their commitment. The US Chemical Manufacturers Association followed suit in 1988 while the European Chemical Industry Council adopted the code in 1989.
- RET
RETurn
- Reticle
In semiconductor parlance, a glass or quartz substrate with a 1OX image of a single IC. The 1OX reticle is produced by a pattern generator. The 1OX pattern may be optically reduced and stepped onto a master plate, or used directly on a stepping aligner system (commonly referred to as a stepper).
- Retrofit
The addition or removal of an item of equipment, or a required adjustment, connection, or disconnection of an existing item of equipment, for the purpose of reducing emissions.
- Reuse
The reintroduction of a waste material or product into the economic stream without any chemical or physical change. An example is the empty soft drink bottle that is returned to the bottling company, sterilized, and refilled.
- Reverse osmosis
A process used to purify concentrated solutions (often water with high levels of dissolved salts) in which pressure is applied to the more concentrated (or contaminated) solution on one side of a semipermeable membrane. The result is the movement of solvent, but not solutes, from the more concentrated side to the more dilute side, thus separating clean solvent from the concentrated solution. RF
1) Radio Frequency
The energy medium used to heat the susceptor in most epitaxial reactors and in crystal-growing furnaces. Radio frequency means that the energy is transferred at a frequency near the radio transmitting band.
2) Response Factor
- RFC
Request for Comments
- RfD
Reference dose
- RFI
1) Radio Frequency Interface
2) Request for Information
- RFID
Radio Frequency Identification
A technology similar in theory to bar code identification. With RFID, the electromagnetic or electrostatic coupling in the RF portion of the electromagnetic spectrum is used to transmit signals. An RFID system consists of an antenna and a transceiver, which read the radio frequency and transfer the information to a processing device, and a transponder, or tag, which is an integrated circuit containing the RF circuitry and information to be transmitted. RFID systems can be used just about anywhere, from clothing tags to missiles to pet tags to food - anywhere that a unique identification system is needed. The tag can carry information as simple as a pet owners name and address or the cleaning instruction on a sweater to as complex as instructions on how to assemble a car. Some auto manufacturers use RFID systems to move cars through an assembly line. At each successive stage of production, the RFID tag tells the computers what the next step of automated assembly is.
- RFQ
Request for Quotation
- RGB
Red Green Blue
- RH
Relative Humidity
- RHDP
Right Hand Decimal Point
- RIM
Read-In Mode
- RIMM
Rambus-1 dual In-line Memory Module
- Rinse
The use of D.I. water to neutralize, clean, and remove another liquid.
- RISC
Reduced Instruction Set Computer
A microprocessor that performs faster than CISC processors.
- Rise Time
A measure of the time required for the output voltage to change from a low voltage level ("O") to a high voltage level ("1") once a level change has been started.
- Risk assessment
A qualitative or quantitative evaluation of the environmental and/or health risk resulting from exposure to a chemical or physical agent (pollutant); combines exposure assessment results with toxicity assessment results to estimate risk.
- RIVA
Real-time Interactive Video Automation
- RLG
Ring Laser Gyroscope
- RMA
Return(ed) Material Authorization
- RMI
Radio Magnetic Interference
- RMM
Read-Mostly Mode
- RMS
Root Mean Square
- RN
Reception Notice
- RNA
Ribonucleic Acid
- Roadmap
A program for future development indicating what will be developed and when.
- Robust Design
Design of a product so that its functionality varies minimally despite of disturbing factor influences.
- ROE
1) Return on Equity
2) Rate of Exchange
3) Rest of Europe
- ROG
Reactive Organic Gases
- ROI
1) Region of Interest
2) Return on Investment
- ROM
1) Return on Materials
2) Read Only Memory (a non volatile memory)
Permanently stores information repeatedly used-such as tables of data, characters of electronic displays, etc. Unlike RAM, ROM cannot be altered. Mask programmable during manufacturing process.
- RONA
Return On Net Asset
A measurement of the profitability of a company
- ROP
Read-out Protection
- ROW
Rest Of World
- RP
1) Respirable Particulates
2) Responsible Party
- RPM
Revolutions Per Minute
- RPS
Revolutions Per Second
- RQ
Reportable Quantity
- RSD
Risk Specific Dose
- RSO
ReStocking Order
- RT
Read Time/Rise Time
- RTB
Real Time Base
- RTC
Real Time Clock
- RTECS
Registry of Toxic Effects of Chemical Substances
- RTI
Real Time Interrupt
- RTL
1) Register Transfer Logic
2) Resistor Transistor Logic
- RTOS
Real Time Operating System
- RTP
Rapid Thermal Processing
- RTS
Request to Send
- RVU
Rom Verification Units
- RWW
Read While Write
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