reference standard
metrology
Reference standard is a certified measurement artifact with known, traceable values used to calibrate working instruments and verify measurement accuracy — the critical link…
3,801 technical terms and definitions
metrology
Reference standard is a certified measurement artifact with known, traceable values used to calibrate working instruments and verify measurement accuracy — the critical link…
reflection high-energy electron diffraction, rheed, metrology
Reflection High-Energy Electron Diffraction (RHEED) is a surface-sensitive structural characterization technique that probes the crystallographic order of a surface by directing…
metrology
Reflection interferometry is an optical metrology technique that monitors film thickness or etch depth in real-time by analyzing the interference pattern of light reflected…
reflective optics, euv, lithography
Reflective optics for EUV refers to the use of multilayer Bragg mirrors instead of conventional lenses to focus and image extreme ultraviolet (EUV) light at 13.5 nm wavelength…
x-ray reflectivity, xrr measurement, thin film xrr, x-ray reflectometry semiconductor
X-ray reflectometry turns a grazing beam and a rapidly fading interference pattern into a depth model of a thin-film stack. The measurement is nondestructive and chemically…
packaging
Reflow profile is the time-temperature trajectory used in solder reflow that governs flux activity, wetting behavior, and joint microstructure - profile design is one of…
packaging
Reflow soldering for SMT is the thermal process that melts printed solder paste to form metallurgical joints between SMT components and PCB pads - it is a central quality gate…
higher reflow temp, packaging, soldering
Higher reflow temperature is the elevated soldering peak temperature used in lead-free assembly that increases thermal stress on components and boards - it is a key process…
regression, ols, least squares, pls, partial least squares, ridge, lasso, semiconductor regression, process regression
Regression Analysis Semiconductor fabrication involves hundreds of sequential process steps, each governed by dozens of parameters. Regression analysis serves critical functions…
metrology
Spectroscopic ellipsometry and inline optical wafer metrology constitute the non-destructive physical measurement and defect detection disciplines that govern yield control across…
rl for eda, policy gradient placement, actor critic design, reward shaping chip design
Reinforcement Learning for Chip Optimization is the application of RL algorithms to learn optimal design policies through trial-and-error interaction with EDA environments — where…
special relativistic dynamics, four-momentum mechanics, relativistic particle dynamics, relativistic energy momentum, relativistic mechanics semiconductor, engineering relativity
Relativistic mechanics predicts motion, momentum, energy, and interaction when speeds, timing precision, or gravitational environment make Newtonian assumptions inadequate. Its…
mtbf chip, failure rate fit, chip reliability qualification, product reliability
Semiconductor reliability physics and accelerated life testing constitute the statistical, thermodynamic, and mechanical disciplines engineered to predict, quantify, and guarantee…
electromigration lifetime, mtbf mttf reliability, burn in screening, failure rate fit
Semiconductor reliability physics and accelerated life testing constitute the statistical, thermodynamic, and mechanical disciplines engineered to predict, quantify, and guarantee…
htol electromigration test, semiconductor burn-in, jedec qualification, device reliability acceleration
Semiconductor reliability physics and accelerated life testing constitute the statistical, thermodynamic, and mechanical disciplines engineered to predict, quantify, and guarantee…
semiconductor reliability, mtbf, electromigration
Semiconductor reliability physics and accelerated life testing constitute the statistical, thermodynamic, and mechanical disciplines engineered to predict, quantify, and guarantee…
electromigration, hot carrier injection, bias temperature instability, tddb gate oxide
Semiconductor reliability physics and accelerated life testing constitute the statistical, thermodynamic, and mechanical disciplines engineered to predict, quantify, and guarantee…
accelerated life testing alt, highly accelerated stress test hast, temperature cycling test, burn-in testing
Semiconductor reliability physics and accelerated life testing constitute the statistical, thermodynamic, and mechanical disciplines engineered to predict, quantify, and guarantee…
residual stress measurement wafer curvature prediction, residual stress measurement, stress measurement wafer, measurement wafer curvature, wafer curvature prediction
Residual Stress Measurement Wafer Curvature Prediction with Machine Learning Introduction & Motivation Residual Stress Measurement Wafer Curvature Prediction with Machine Learning…
packaging
Resin bleed is the flow of low-molecular-weight resin components outside intended molded regions during or after encapsulation - it can contaminate surfaces, degrade adhesion…
capillary collapse resist line, supercritical drying lithography, low surface tension rinse resist
Resist Pattern Collapse Underfill uses capillary force on purpose, pulling liquid epoxy into a gap it's supposed to fill. The same capillary force shows up again later in the fab…
lithography
Resist profile simulation is the computational prediction of the 3D shape of photoresist after exposure, bake, and development steps in lithography. It models how the resist…
lithography
Resist sensitivity (also called photospeed) measures the amount of exposure energy required to produce the desired chemical change in a photoresist — specifically, the dose…
wafer coating, spin coat thickness control
Resist spin coating deposits a uniform photoresist film across a wafer by dispensing a viscous polymer solution at the center and using centrifugal force to spread and thin it…
lithography
Resolution is the smallest feature — a line, a space, or a contact hole — that a lithography system can reliably print to spec across an entire wafer, not just under ideal…
metrology
Resolution in metrology is the smallest change in a measured quantity that a measurement instrument can detect — the fundamental capability limit that determines whether…
rims, metrology
Resonant Ionization Mass Spectrometry (RIMS) is an ultra-trace analytical technique that combines element-selective laser resonant ionization with mass spectrometry to achieve…
resonance raman spectroscopy, resonant raman spectroscopy, raman excitation profile, electronic resonance raman, semiconductor resonance raman, resonance raman metrology
Resonance Raman spectroscopy is most powerful when the laser is treated as a tunable part of the experiment rather than a brighter way to collect the same spectrum. As photon…
RSOXS, absorption edge tuning, block copolymer DSA, material composition contrast, multi energy measurement, compositional gradient, directed self assembly metrology
Resonant soft X-ray scatterometry tunes the X-ray beam's energy to specific elemental absorption edges — carbon, nitrogen, oxygen, and silicon K-edges typically sitting somewhere…
resputter, re-sputtering, bias sputtering, sputter etch-back, overhang removal, punch-through, pvd resputtering, substrate bias sputtering, bottom redistribution, sidewall redeposition, copper seed resputter, barrier resputter
Resputtering deliberately removes part of a deposited film so ion momentum can route material from overfed horizontal surfaces toward underfed feature walls. A sputter target is…
lithography
The reticle limit is the maximum area a lithography scanner can pattern in a single exposure — roughly 26 mm x 33 mm, about 858 mm². A reticle (the photomask) holds the pattern…
lithography, SMIF pod, EUV dual pod, robotic mask handler, electrostatic discharge protection, Class 1 cleanliness, automated handling, mask contamination, mask breakage risk
Reticle handling is the set of specialized systems and procedures — sealed transport pods, robotic handlers, electrostatic discharge protection — that move a photomask between…
lithography, haze formation, pellicle transmission loss, cleaning cycle CD shift, EUV carbon contamination, ruthenium oxidation, mask retirement decision, degradation trend monitoring, critical dimension shift
Reticle lifetime is the total usable duration a photomask delivers before cumulative degradation drops its patterning quality below production specification — governed by…
reticle field, max die size, 858mm2, scanner field size, reticle stitching, chiplet motivation
The reticle limit is the hard physical ceiling on how big a single chip can be, set not by transistor density or lithography resolution but by the mechanical field size of…
lithography, mask inventory tracking, usage logging, maintenance scheduling, contamination monitoring, haze, pellicle replacement, mask lifetime cost, proactive mask maintenance
Reticle management is the comprehensive system that tracks, stores, maintains, and controls every photomask throughout its entire working life in a fab — inventory location, usage…
lithography
A reticle or photomask is the precision pattern master used by a lithography scanner to print one layer of an integrated circuit onto photoresist. It carries geometric information…
reticle registration metrology drift prediction, reticle registration metrology, registration metrology drift, metrology drift prediction, reticle registration
Reticle Registration Metrology Drift Prediction with Machine Learning Introduction & Motivation Reticle Registration Metrology Drift Prediction with Machine Learning addresses…
packaging
Reverse bonding is the wire-bond sequence where first bond is formed on lead or substrate side and second bond is made on die pad to optimize loop geometry and reliability - it is…
lithography
Reverse Tone Imaging is a lithographic technique that uses the complementary tone of the conventional resist and mask combination — patterning with negative-tone development where…
metrology
Review SEM is high-resolution scanning electron microscopy used to inspect detected defects — providing detailed visual analysis of particles, pattern defects, and material…
mmwave beamforming ic, phased array chip mmwave, 28ghz 39ghz 5g front end, si ge mmwave
Radio frequency (RF), millimeter-wave (mmWave), and sub-terahertz semiconductor transistor architectures constitute the core analog frontend and high-frequency mixed-signal…
mmwave, rf chip, radio frequency ic
Radio frequency (RF), millimeter-wave (mmWave), and sub-terahertz semiconductor transistor architectures constitute the core analog frontend and high-frequency mixed-signal…
low noise amplifier, lna, rf low noise amplifier, receiver front end, rf semiconductor design, fukui noise
Radio frequency (RF), millimeter-wave (mmWave), and sub-terahertz semiconductor transistor architectures constitute the core analog frontend and high-frequency mixed-signal…
rf wafer probe de-embedding accuracy prediction, rf wafer probe, wafer probe de-embedding, probe de-embedding accuracy, de-embedding accuracy prediction, rf wafer
RF Wafer Probe De-Embedding Accuracy Prediction with Machine Learning Introduction & Motivation RF Wafer Probe De-Embedding Accuracy Prediction with Machine Learning addresses…
rga, residual gas analyzer, metrology
A Residual Gas Analyzer (RGA) is a mass spectrometer attached to a process chamber that identifies and quantifies the gas species present in the chamber environment. It is…
reactive ion etch, reactive ion etching, dry etch, plasma etch, etch modeling, plasma physics
Mathematical Modeling of Plasma Etching in Semiconductor Manufacturing Introduction Plasma etching is a critical process in semiconductor manufacturing where reactive gases are…
end effector, edge grip vacuum Bernoulli electrostatic, SCARA robot, vacuum transfer chamber, EFEM atmospheric robot, placement repeatability, particle generation, collision avoidance, clean handling
Wafer handling robots are precision automated arms responsible for transferring wafers between pods, aligners, load locks, and process chambers throughout the fab — a task that…
robotic arm wafer placement repeatability prediction, robotic arm wafer, arm wafer placement, wafer placement repeatability, placement repeatability prediction, robotic arm
Robotic Arm Wafer Placement Repeatability Prediction with Machine Learning Introduction & Motivation Robotic Arm Wafer Placement Repeatability Prediction with Machine Learning…
rtp wafer bow-induced temperature error prediction, rtp wafer bow-induced, wafer bow-induced temperature, bow-induced temperature error, rtp wafer, error prediction
RTP Wafer Bow-Induced Temperature Error Prediction with Machine Learning Introduction & Motivation RTP Wafer Bow-Induced Temperature Error Prediction with Machine Learning…
packaging
Runner system is the network of flow channels that distributes molding compound from the pot to each mold cavity - it governs fill balance, pressure distribution, and material…