1,706 technical terms and definitions
drain-induced barrier lowering prediction, drain-induced barrier lowering, barrier lowering prediction, drain-induced barrier, barrier lowering, lowering prediction
Drain-Induced Barrier Lowering Prediction with Machine Learning Introduction & Motivation Drain-Induced Barrier Lowering Prediction with Machine Learning addresses a central…
drain-induced barrier lowering prediction, drain-induced barrier lowering, barrier lowering prediction, drain-induced barrier, barrier lowering, lowering prediction
Drain-Induced Barrier Lowering Prediction with Machine Learning Introduction & Motivation Drain-Induced Barrier Lowering Prediction with Machine Learning addresses a central…
ibm 1968 dennard sequential versus combinational device, 1t1c dram 1968 output depends on its own past state, dram memory 1968 first device this project built for persistence
Why Memory Needs an Entirely Different Structure Than Logic: The First Device This Project Has Built for Persistence, Not Speed 1. Why Every Earlier Series Built a Device That…
ibm dennard 1968 one transistor one capacitor memory cell, 1t1c dram charge storage replaces multi transistor latch, dram 1968 access transistor controls write and read
Store a Bit as Charge on a Capacitor, Not as a Latch of Transistors: Dennard's Radical Simplification 1. Replace a Circuit That Continuously Defends Its State with One Physical…
ibm dennard 1t1c word line bit line storage node transistor, 1t1c dram access mosfet selected row shared bit line, dram 1968 reuse silicon gate process for access transistor
Build the Access Transistor Using the Self-Aligned Gate Process Just Completed: A Direct Reuse of 1967's Silicon-Gate Process 1. The New Memory Architecture Does Not Require a New…
ibm dennard 1t1c mos capacitor stores bit charge, 1t1c dram capacitor area oxide thickness capacitance, dram 1968 mos capacitor becomes functional storage element
Build the Storage Capacitor Beside the Transistor: Turn the MOS Capacitor from a Test Structure into the Bit Itself 1. Reuse the Gate-Oxide-Silicon Stack for a Completely…
ibm dennard 1t1c subthreshold junction dielectric leakage, 1t1c dram storage node charge decay leakage current, dram 1968 dynamic memory leakage requires refresh
Confront Leakage: Why the Charge Does Not Stay Forever 1. The Same Off-State Current That Was Negligible for CMOS Logic Is Now the Central Failure Mechanism The 1963 CMOS series…
ibm dennard 1t1c write wait read retention test, 1t1c dram weakest cell retention distribution guard band, dram 1968 refresh interval protects stored charge margin
Measure the Retention Time and Set the Refresh Interval 1. Retention Time Is Measured from a Completed Write to the Last Reliable Read Step 5 established that leakage continuously…
ibm dennard 1t1c bit line charge sharing read, 1t1c dram sense amplify restore after every read, dram 1968 reading capacitor requires write back
Confront Destructive Readout: Reading the Cell Disturbs the Charge Being Read 1. The Bit Cannot Be Observed Without Connecting It to a Much Larger Electrical Node A 1T1C cell has…
ibm dennard 1t1c cell area compared with 6t memory, 1t1c dram repeated cell tile and shared periphery density, dram 1968 smaller cell enables higher bit density
Measure the Area Advantage Against a Six-Transistor Latch 1. Compare Repeated Cell Footprints, Not Transistor Counts in Isolation The density advantage of Dennard's cell comes…
ibm dennard 1t1c cell density shared array overhead, 1t1c dram refresh occupancy sensing restore tradeoff, dram 1968 qualify complete memory macro architecture
Qualify the Trade: Density Against Refresh Complexity 1. The Cell Becomes Simpler by Moving Work into the Array The 1T1C architecture does not eliminate the functions a memory…
ibm dennard 1t1c dynamic random access memory classification, 1t1c dram cell array macro release qualification, dram 1968 compact cell shared circuitry enables large memory
Classify and Release: The Architecture That Makes Large-Scale Memory Possible 1. Classify the Finished Device by What It Stores and What It Requires The completed one-transistor…
buried word line DRAM, BWL DRAM, recessed channel array transistor, RCAT DRAM, saddle-fin DRAM transistor, GIDL DRAM word line, word line GIDL, sub word line driver, hierarchical word line, DRAM Vpp word line boost
DRAM Buried Word Line: Saddle-Fin Gate Architecture, the GIDL Trade-Off, and Hierarchical Row Activation A buried word line (BWL) is a DRAM access-transistor gate that no longer…
dram capacitor aspect ratio uniformity prediction, dram capacitor aspect, capacitor aspect ratio, aspect ratio uniformity, ratio uniformity prediction, aspect ratio
DRAM Capacitor Aspect Ratio Uniformity Prediction with Machine Learning Introduction & Motivation DRAM Capacitor Aspect Ratio Uniformity Prediction with Machine Learning addresses…
dram capacitor dielectric leakage current prediction, dram capacitor dielectric, capacitor dielectric leakage, dielectric leakage current, dram capacitor
DRAM Capacitor Dielectric Leakage Current Prediction with Machine Learning Introduction & Motivation DRAM Capacitor Dielectric Leakage Current Prediction with Machine Learning…
dram capacitor leakage drift prediction, dram capacitor leakage, capacitor leakage drift, leakage drift prediction, dram capacitor, capacitor leakage, leakage drift, drift prediction
DRAM Capacitor Leakage Drift Prediction with Machine Learning Introduction & Motivation DRAM Capacitor Leakage Drift Prediction with Machine Learning addresses a central problem…
ECC DRAM, SECDED, Hamming code DRAM, Chipkill, Advanced ECC, ECC DIMM, single error correction double error detection
DRAM ECC: Hamming SECDED Architecture, Reliability Theory, and the Chipkill Application ECC is the layer that stops pretending the physics underneath it is perfect. Every…
dram cell structure, dram capacitor, dram refresh, 1t1c dram cell
DRAM (dynamic random-access memory) stores each bit as charge on a tiny capacitor, gated by a single access transistor — the '1T1C' cell. It is 'dynamic' because that charge leaks…
dram refresh bitmap repair prediction, dram refresh bitmap, refresh bitmap repair, bitmap repair prediction, dram refresh, refresh bitmap, bitmap repair, repair prediction
DRAM Refresh Bitmap Repair Prediction with Machine Learning Introduction & Motivation DRAM Refresh Bitmap Repair Prediction with Machine Learning addresses a central problem…
dram refresh command overhead prediction, dram refresh command, refresh command overhead, command overhead prediction, dram refresh, refresh command, command overhead
DRAM Refresh Command Overhead Prediction with Machine Learning Introduction & Motivation DRAM Refresh Command Overhead Prediction with Machine Learning addresses a central problem…
refresh controller DRAM, tREFI DRAM, tRFC refresh cycle time, per-bank refresh, REFpb, all-bank refresh, refresh overhead DRAM, DRAM temperature compensated refresh
DRAM Refresh Controller: Row-Scheduling Architecture, the Refresh-Tax Theory, and Per-Bank Refresh Application The refresh controller is the part of DRAM that never gets to rest.…
dram refresh cycle optimization prediction, dram refresh cycle, refresh cycle optimization, cycle optimization prediction, dram refresh, refresh cycle, cycle optimization
DRAM Refresh Cycle Optimization Prediction with Machine Learning Introduction & Motivation DRAM Refresh Cycle Optimization Prediction with Machine Learning addresses a central…
dram, dynamic random-access memory, 1T1C DRAM, DRAM cell architecture, DRAM refresh, DRAM storage capacitor, DRAM memory matrix, DRAM sensing, dram refresh fail bit count, fail bit count prediction
DRAM: Dynamic Random-Access Memory — Architecture, Retention Physics, and 1T1C Scaling Dynamic Random-Access Memory (DRAM) is the fundamental working memory of computing: it…
dram refresh interval drift prediction, dram refresh interval, refresh interval drift, interval drift prediction, dram refresh, refresh interval, interval drift, drift prediction
DRAM Refresh Interval Drift Prediction with Machine Learning Introduction & Motivation DRAM Refresh Interval Drift Prediction with Machine Learning addresses a central problem…
dram refresh overhead and capacity trade-offs, dram refresh overhead, refresh overhead capacity, overhead capacity trade-offs, dram refresh, refresh overhead, overhead capacity
DRAM Refresh Overhead and Capacity Trade-Offs Introduction & Motivation DRAM Refresh Overhead and Capacity Trade-Offs addresses a central problem in memory process control…
dram refresh rate optimization, dram refresh rate, refresh rate optimization, dram refresh, refresh rate, rate optimization
DRAM Refresh Rate Optimization with Machine Learning Introduction & Motivation DRAM Refresh Rate Optimization with Machine Learning addresses a central problem in DRAM refresh…
dram memory optimizing refresh rates in dram to balance power and data retention, dram memory optimizing, memory optimizing refresh, optimizing refresh rates, refresh rates dram, dram memory
DRAM Memory: Optimizing refresh rates in DRAM to balance power and data retention Introduction & Motivation DRAM Memory: Optimizing refresh rates in DRAM to balance power and data…
optimizing refresh rates in dram to balance power and data retention, optimizing refresh rates, refresh rates dram, rates dram to, dram to balance, to balance power, balance power data
Optimizing refresh rates in DRAM to balance power and data retention Introduction & Motivation Optimizing refresh rates in DRAM to balance power and data retention addresses…
dram refresh row hammer prediction, dram refresh row, refresh row hammer, row hammer prediction, dram refresh, refresh row, row hammer, hammer prediction
DRAM Refresh Row Hammer Prediction with Machine Learning Introduction & Motivation DRAM Refresh Row Hammer Prediction with Machine Learning addresses a central problem in DRAM…
next-generation dram technology, next-generation dram, dram technology
Next-Generation DRAM Technology Introduction & Motivation Next-Generation DRAM Technology addresses a central problem in memory process control and capacity-per-die prediction…
row hammer DRAM, rowhammer, aggressor row victim row, target row refresh, TRR DRAM, activation threshold DRAM, PRAC DDR5, refresh management RFM
DRAM Row Hammer: Disturbance Architecture, the Activation-Threshold Theory, and Target Row Refresh Application Row hammer is what happens when the same electrical margins this…
high bandwidth memory HBM, DRAM cell capacitor, DDR5 LPDDR5 memory, memory wall bandwidth
High-bandwidth memory (HBM) is DRAM stacked vertically and connected to its host through an interface thousands of bits wide, running beside the processor on an interposer rather…
sense amplifier DRAM, cross-coupled latch DRAM, folded bitline DRAM, bit line isolation transistor, DRAM bit line equalization, sense amp offset DRAM, Pelgrom law DRAM, regenerative sense amplifier
DRAM Sense Amplifier: Cross-Coupled Latch Architecture, Regenerative Feedback Theory, and the Folded-Bitline Application The sense amplifier is where a DRAM read actually becomes…
DRAM shallow trench isolation, shallow trench isolation DRAM, DRAM cell isolation, STI corner leakage, buried word line isolation, saddle fin transistor, DRAM active area isolation, STI gap fill DRAM, cell-to-cell leakage DRAM, STI aspect ratio scaling
DRAM STI: Shallow Trench Isolation Architecture, Corner-Leakage Theory, and the Cell-to-Cell Isolation Moat Shallow trench isolation (STI) is the etched, oxide-filled moat that…
dram storage capacitor aspect ratio prediction machine learning, dram storage, capacitor aspect ratio, dram sem, dram storage capacitor aspect ratio prediction
DRAM Storage Capacitor Aspect Ratio Prediction with Machine Learning Introduction & Motivation DRAM Storage Capacitor Aspect Ratio Prediction with Machine Learning addresses…
dram technology roadmap, dram technology, technology roadmap
DRAM Technology Roadmap Introduction & Motivation DRAM Technology Roadmap addresses a central problem in memory process control and capacity prediction: how to Predict capacity…
dram cell capacitor, dram high k capacitor, 4f2 dram cell, dram refresh reliability
High-bandwidth memory (HBM) is DRAM stacked vertically and connected to its host through an interface thousands of bits wide, running beside the processor on an interposer rather…
twin cell DRAM, differential sense amplifier DRAM, dummy cell reference DRAM, common-mode rejection DRAM, radiation hardened DRAM, twin cell sensing
DRAM Twin-Cell Reference: Differential Sensing Architecture, Common-Mode Cancellation Theory, and the Reliability-Density Trade-Off A twin-cell reference replaces the sense…
dram voltage and timing drift prediction, dram voltage timing, voltage timing drift, timing drift prediction, dram voltage, voltage timing, timing drift, drift prediction
DRAM Voltage and Timing Drift Prediction with Machine Learning Introduction & Motivation DRAM Voltage and Timing Drift Prediction with Machine Learning addresses a central problem…
dram word line resistance variation prediction, dram word line, word line resistance, line resistance variation, resistance variation prediction, dram word, word line
DRAM Word Line Resistance Variation Prediction with Machine Learning Introduction & Motivation DRAM Word Line Resistance Variation Prediction with Machine Learning addresses…
row address strobe column address strobe active low latch, t_rcd ras to cas delay sense amplifier settling time, ras cas timing cost traded against pin count savings
Tell the Chip Which Half of the Address It Is Looking At 1. Add the Signal the Multiplexing Scheme Was Missing Step 1 showed that the same 8 pins can carry a row address and then…
ras activates entire row simultaneously access transistors, row wide refresh side effect single cell access, ras only cycle deliberate row refresh tool mechanism
One Strobe Touches Every Cell in a Row, Whether You Asked It To or Not 1. Follow RAS Past Addressing Into What It Actually Does to the Array Step 2 treated as an addressing…
row column split r times c determines refresh count, wide rows fewer refresh cycles more sense amp load, refresh overhead t_rc tradeoff row count sense amplifier power
Choose the Array's Shape, and the Refresh Count Falls Out of That Choice 1. Turn Step 3's Row-Wide Refresh Into a Concrete Cycle Count Step 3 established that one -only cycle…
automated row stepping host triggers refresh generically, refresh overhead fraction r times t_rc over t_ret, responsibility moves to chip where retention physics lives
Let the Chip Remember Which Row Comes Next, So the System Does Not Have To 1. State What Manual Row-Stepping Would Demand of the Host System Step 4 established that a complete…
multiplexed addressing architecture outlives specific numbers, pin count constraint propagated never resolved away, first dram series about periphery not cell interior
Classify and Close: What Every Later DRAM Keeps, and What Was Only 64K's Own Arithmetic 1. Separate the Enduring Mechanism From This Generation's Particular Numbers Every step…
1t1c dram cell trench stacked capacitor transition, dram capacitor area shrinks faster than signal charge requirement, dram scaling 1974 geometry limit leaves the plane for the third dimension
Why a Shrinking Cell Forces the Capacitor Off the Plane: Planar Charge Storage Collapses Under Scaling 1. State the Constraint the 1968 Cell Never Had to Face The 1T1C cell fixes…
trench versus stacked capacitor dram 3d cell geometry, dram scaling substrate trench punchthrough vs stacked topography, 1t1c capacitor area perimeter height product third dimension
Step 2 — Choose Between Etching Down (Trench) and Building Up (Stacked): Two Geometries for the Third Dimension 1. The Fundamental Fork: Substrate Etching vs. Over-Gate…
deep reactive ion etch trench capacitor aspect ratio limits, dram trench sidewall capacitance scales with etch depth, aspect ratio dependent etching arde and void free fill dram
Step 3 — Build the Trench: Etch Depth as the New Area Budget 1. Sidewall Area Replaces Planar Pitch By cutting a high-aspect-ratio vertical cavity into the silicon substrate…
stacked capacitor crown cylinder hsg poly storage node dram, stacked dram alpha soft error immunity dielectric isolated, stacked capacitor topography step height depth of focus
Step 4 — Build the Stacked Capacitor: Rising Above the Transistor 1. Climbing Vertically into the Free Space Above the Gate Rather than excavating deep into the fragile silicon…
trench versus stacked quantitative aspect ratio comparison dram, why dram industry forked trench versus stacked capacitor camps, dram storage capacitance 35 femtofarad area budget comparison
Step 5 — Compare the Two Geometries on the Same Electrical Terms: Why the Industry Forked 1. Equalizing the Electrical Baseline: The 35 fF Target When trench and stacked…