3,801 technical terms and definitions
plasma-enhanced deposition, PECVD process, silicon nitride PECVD, SiN deposition
Plasma-enhanced chemical vapor deposition has evolved from a niche laboratory technique into the workhorse thin-film deposition technology for advanced semiconductor…
plasma deposition, pecvd film
Plasma-Enhanced CVD (PECVD) is a thin film deposition technique that uses plasma to activate chemical reactions at lower temperatures than thermal CVD — enabling dielectric…
pecvd (plasma-enhanced cvd), plasma-enhanced cvd, cvd, plasma enhanced chemical vapor deposition, pecvd chamber, plasma deposition, low temperature cvd, rf pecvd
PECVD trades substrate heat for plasma energy: electron-driven dissociation creates reactive radicals at low wafer temperature, while sheath-accelerated ions, hydrogen…
pecvd silicon nitride oxide, pecvd film stress control, pecvd low temperature deposition, pecvd dielectric interlayer
Plasma-Enhanced Chemical Vapor Deposition (PECVD) is a thin film deposition technique that uses radio-frequency plasma to activate gas-phase precursors at temperatures 200-400°C…
lithography, standoff distance, pellicle frame, transmission loss, EUV pellicle, carbon nanotube membrane, DUV pellicle, haze degradation, contamination protection
Pellicle mounting attaches a thin, transparent membrane over a mask's patterned surface, held a precisely-defined standoff distance away — not touching the pattern itself — so…
packaging, board layer count, escape routing, ball map planning, PCB cost reduction, depopulated array, moderate pin count package, assembly process window, edge ball placement
Peripheral BGA is a ball-array layout that concentrates solder balls in the outer rows near a package's edges while leaving the center partially or fully empty — deliberately…
projection lithography tool, photolithography history, semiconductor equipment, wafer scanner, 1970s lithography
The Perkin-Elmer Micralign was a landmark projection-lithography system introduced in the 1970s that is widely credited with making projection printing practical for volume…
advanced packaging
Permanent bonding after thinning is the final joining process that permanently attaches thinned wafers or dies to target substrates for electrical, thermal, and mechanical…
resolution enhancement, optical interference, sub-wavelength lithography, mask phase, DUV technique
A phase-shift mask is a resolution-enhancement technique in lithography in which the mask is designed to alter the phase of the light passing through certain regions, so that…
phase-shift mask, psm, lithography
Phase-Shift Mask (PSM) is a photolithography reticle technology that uses transparent regions of different optical path lengths to create destructive interference at feature…
raman phonon analysis, phonon mode assignment, phonon dispersion analysis, raman mode symmetry, semiconductor phonon modes, phonon spectroscopy metrology
Phonon mode analysis turns peaks into a model of how atoms move, how crystal symmetry constrains that motion, and how the lattice responds to temperature, stress, composition…
oxide masking 1957 silicon dioxide diffusion barrier, photolithography 1957 bell labs andrus bond dofl lathrop, thermal oxidation consumes silicon interface 1957 oxide mask
Grow the Thermal Oxide Layer: Turning Silicon's Own Native Chemistry Into a Diffusion Barrier 1. Why Silicon Dioxide Can Stop a Dopant That Silicon Cannot This step heats…
oxide masking 1957 interference color ellipsometry measurement, photolithography 1957 oxide uniformity wafer edge failure, deal grove oxidation law oxide mask verification 1957
Verify Oxide Thickness and Uniformity: Measuring a Barrier Before Trusting It to Hold 1. Why a Barrier Has to Be Measured Before It Is Believed This step takes the oxide Step 1…
oxide masking 1957 spin coating resist thickness speed, photolithography 1957 kodak photoresist printing industry origin, resist edge bead spin coat uniformity 1957 oxide mask
Apply the Photoresist Coating: Borrowing a Printing-Industry Chemistry and Asking It to Hold a Micron 1. Why a Film From the Printing Trade Had to Learn a New Tolerance This step…
oxide masking 1957 solvent removal resist adhesion bake, photolithography 1957 resist tacky mask contamination risk, arrhenius solvent loss soft bake window 1957 oxide mask
Soft-Bake the Photoresist: Driving Off Solvent Without Driving Off Sensitivity 1. Why Two Different Reactions Share the Same Oven and Disagree About the Temperature This step…
oxide masking 1957 overlay registration error budget, photolithography 1957 lathrop nall dofl microscope alignment, systematic misalignment whole wafer loss 1957 oxide mask
Align the Photomask to the Wafer: The Step Where Geometry Becomes a Registration Problem 1. Why Alignment Is Easy Once and Hard Every Time After This step brings a photomask…
oxide masking 1957 exposure dose resist contrast gamma, photolithography 1957 diffraction near contact feature limit, light replaces physical tooling geometry 1957 oxide mask
Expose the Photoresist Through the Mask: Where a Pattern Stops Being Glass and Becomes Chemistry 1. Why a Blurred Optical Edge Can Still Produce a Sharp Chemical One This step…
oxide masking 1957 developer selectivity dissolution rate, photolithography 1957 residual resist skin blocked window, latent image becomes topography develop 1957 oxide mask
Develop the Exposed Photoresist: Turning a Latent Chemical Difference Into an Actual Hole 1. Why the Pattern Has Been Invisible Until This Moment This step immerses the wafer in…
oxide masking 1957 resist adhesion flow temperature optimum, photolithography 1957 hf undercut resist edge lifting, competing arrhenius rates hard bake window 1957 oxide mask
Hard-Bake the Developed Resist: Toughening a Pattern for the Acid That Comes Next 1. Why the Safer-Looking Temperature Is Not Automatically the Right One This step returns…
oxide masking 1957 defect density poisson yield model, photolithography 1957 rework strip recoat reversible stage, pinhole missed defect propagation inspection 1957 oxide mask
Inspect the Resist Pattern: The Last Point at Which a Mistake Is Still Free 1. Why This Inspection Is Worth More Than Any Inspection Before It This step examines the developed…
oxide masking 1957 buffered hf isotropic undercut bias, photolithography 1957 etch selectivity silicon self limiting, window width oxide thickness tradeoff 1957 oxide mask etch
Etch the Exposed Oxide: Opening the Windows the Dopant Will Be Allowed Through 1. Why the Same Thickness That Makes a Good Mask Makes a Worse Window This step immerses the wafer…
oxide masking 1957 resist residue carbonisation furnace, photolithography 1957 stripper attacks oxide mask thinning, organic residue trap states delayed failure 1957 oxide mask
Strip the Remaining Photoresist: Removing the Tool Once It Has Finished Handing Over Its Pattern 1. Why a Furnace Cannot Tell the Difference Between a Wafer and Whatever Is…
oxide masking 1957 critical dimension cd budget audit, photolithography 1957 field oxide pinhole parasitic diffusion, oxide mask verification before diffusion 1957 photolithography
Inspect the Oxide Window Pattern: Confirming the Mask That Will Decide Where Every Junction Forms 1. Why One Measurement Can Now Audit Four Earlier Steps at Once This step…
oxide masking 1957 selective diffusion patterned doped region, photolithography 1957 lateral diffusion under oxide edge, patterned versus blanket diffusion 1957 oxide mask windows
Diffuse Dopant Through the Opened Windows: The Moment Selective Doping Actually Happens 1. Why the Furnace Itself Changed Nothing, and Everything Changed Anyway This step places…
oxide masking 1957 thermal budget cumulative dt junction, photolithography 1957 second masking level preparation, junction deepening later thermal steps 1957 oxide mask regrow
Strip and Regrow the Oxide: Resetting the Mask Without Resetting the Wafer 1. Why a Furnace Cycle Keeps Charging Interest on a Debt the Wafer Already Owes This step strips…
oxide masking 1957 batch processing devices per wafer, photolithography 1957 emitter window inside base overlay, cost per device wafer economics 1957 oxide mask batch
Repeat Masking for the Second Level: Where One Wafer Becomes Hundreds of Devices at Once 1. Why Every Capability Built So Far Compounds in This One Step This step repeats Steps 3…
oxide masking 1957 wafer probe ink dot pass fail map, photolithography 1957 spatial failure signature diagnostic, probe before package economics 1957 oxide mask batch test
Wafer-Level Parametric Test: Measuring Hundreds of Devices Before Any of Them Has Been Packaged 1. Why It Is Cheaper to Find a Bad Device Than to Package One This step probes…
oxide masking 1957 street width area efficiency overhead, photolithography 1957 scribe chipping adjacent die loss, dicing grid committed at mask design 1957 oxide mask
Scribe and Dice the Wafer: Separating Hundreds of Devices Along Lines Drawn Fifteen Steps Earlier 1. Why the Street Width This Step Needs Was Already Decided Before This Step…
oxide masking 1957 grade partition parameter distribution, photolithography 1957 fairchild founded philco madt context, batch distribution replaces individual judgement 1957 oxide mask
Classify, Accept, Downgrade, or Reject: Where a Wafer's Worth of Process Becomes a Batch of Graded Parts 1. Why the Product Line Is Discovered, Not Designed This step packages…
what is photolithography, lithography basics, optical lithography, semiconductor lithography basics
Lithography is how a chip design becomes a physical pattern: light is projected through a patterned mask onto photoresist on the wafer, printing one circuit layer at a time.…
photolithography step 13 aberrations and correction, aberrations and correction
Aberrations and Correction: Step 13 Spherical aberration, coma, astigmatism, wavefront sensing, adaptive optics Step 13 advances photolithography by addressing key mechanisms…
photolithography coater nozzle clog prediction machine learning, photolithography coater, nozzle clog prediction, photolithography coater nozzle clog prediction
Photolithography Coater Nozzle Clog Prediction with Machine Learning Introduction & Motivation Photolithography Coater Nozzle Clog Prediction with Machine Learning addresses…
photolithography step 21 defect inspection and metrology, defect inspection and metrology
Defect Inspection and Metrology: Step 21 Optical inspection, SEM review, critical dimension measurement, overlay check Step 21 advances photolithography by addressing key…
photolithography step 16 double patterning lithography, double patterning lithography
Double Patterning Lithography: Step 16 Two exposure-develop cycles, trim mask, cut mask, litho-litho-etch (LLE) Step 16 advances photolithography by addressing key mechanisms…
numerical aperture coherence illumination condition resist exposure
Exposure is the step where the scanner actually fires light through the reticle and lens to print one chip's pattern onto one location on the wafer — repeated field by field until…
photolithography step 18 extreme ultraviolet euv lithography, extreme ultraviolet euv lithography
Extreme Ultraviolet (EUV) Lithography: Step 18 13.5 nm wavelength, reflective optics, tin plasma sources, pellicle masks This step advances photolithography by addressing [topic].…
photolithography step 14 illumination optimization, illumination optimization
Illumination Optimization: Step 14 Coherence, NA matching, off-axis illumination, sigma setting optimization Step 14 advances photolithography by addressing key mechanisms…
photolithography step 15 immersion lithography fundamentals, immersion lithography fundamentals
Immersion Lithography Fundamentals: Step 15 High-refractive-index fluids, interface stability, water absorption, defect formation Step 15 advances photolithography by addressing…
spherical aberration coma astigmatism defocus, refractive index immersion lithography na optimization
A photolithography lens is the multi-element optical system that collects light diffracted by the mask and refocuses it onto the wafer at reduced scale — typically 4:1 — while…
rayleigh resolution limit feature size critical dimension, excimer laser mercury xenon lamp coherent light
A photolithography light source is the illumination system that generates the UV or EUV light used to project a chip's circuit pattern onto the photoresist-coated wafer — and…
photolithography step 23 multiple patterning at scale, multiple patterning at scale
Multiple Patterning at Scale: Step 23 Patterning 3+ times to print sub-wavelength features, complexity and yield tradeoffs Step 23 advances photolithography by addressing key…
photolithography step 10 optical proximity correction, optical proximity correction opc
Optical Proximity Correction (OPC): Step 10 Mask compensation for diffraction, off-axis illumination, resist bias correction Step 10 advances photolithography by adjusting mask…
scanner alignment, registration error, overlay budget, layer registration lithography
Overlay metrology measures the in-plane registration vector between a newly patterned lithography layer and a reference layer already on the wafer. A tool observes dedicated…
photolithography step 20 pattern transfer and etch, pattern transfer and etch
Pattern Transfer and Etch: Step 20 Reactive ion etching (RIE), resist stripping, multilayer etch sequences Step 20 advances photolithography by addressing key mechanisms affecting…
photolithography step 24 pellicle masks and protection, pellicle masks and protection
Pellicle Masks and Protection: Step 24 Pellicle protection from particles, thermal management, pellicle defect control Step 24 advances photolithography by addressing key…
photolithography step 11 phase shifting masks, phase shifting masks psm
Phase-Shifting Masks (PSM): Step 11 Attenuated and alternating phase masks, contrast enhancement, PSM design Step 11 advances photolithography by exploiting wave interference…
photolithography step 25 photolithography manufacturing and yield, photolithography manufacturing and yield
Photolithography Manufacturing and Yield: Step 25 Production throughput, defect sources, yield optimization, cost-per-chip Step 25 advances photolithography by addressing key…
photolithography step 12 polarization effects and control, polarization effects and control
Polarization Effects and Control: Step 12 Radial/azimuthal polarization, vector diffraction, polarization-resolved imaging This step advances photolithography by addressing…
photolithography step 19 resist outgassing and line collapse, resist outgassing and line collapse
Resist Outgassing and Line Collapse: Step 19 Resist pattern collapse, outgassing, aspect-ratio-dependent etching (ARDE), sidewall support Step 19 advances photolithography…
photolithography step 22 resist trimming and refinement, resist trimming and refinement
Resist Trimming and Refinement: Step 22 Trim process optimization, sidewall smoothing, CD tightening, pattern refinement Step 22 advances photolithography by addressing key…