INDUSTRY COMPONENT

Word Line

Word line is a conductive pathway in memory arrays that selects rows of memory cells for read/write operations in semiconductor devices.

Component Specifications

Definition
A word line is a critical horizontal conductive line in memory array architectures (DRAM, SRAM, Flash) that runs across multiple memory cells in a row. It functions as the row selection mechanism, activating specific memory cells when voltage is applied during read or write cycles. Word lines are typically fabricated from polysilicon or metal layers and are precisely patterned using photolithography to ensure proper electrical isolation and signal integrity across the memory matrix.
Working Principle
Word lines operate by applying a specific voltage to select an entire row of memory cells. When activated, the word line voltage opens access transistors in the selected row, allowing bit lines to read from or write to the storage capacitors or transistors in those cells. This row-based addressing minimizes the number of control lines needed and enables efficient memory access through row/column decoding circuits.
Materials
Polysilicon (doped), Tungsten, Copper, Aluminum, with dielectric insulation (SiO2, Si3N4)
Technical Parameters
ParameterTypical rangeNotes & selection driver
Pitch40-200 nm
Width20-100 nm
Resistance< 100 Ω/cm
Capacitance10-50 fF/mm
Operating Voltage0.8-3.3 V

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
JEDEC JESD21-C, SEMI Standards

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Electromigration
  • Signal crosstalk
  • Line resistance variation
  • Dielectric breakdown
  • Process variation effects
FMEA Triads
Trigger: High current density during frequent access
Failure: Electromigration leading to open circuits
Mitigation: Use wider lines, barrier layers, and current limiting circuits
Trigger: Capacitive coupling between adjacent lines
Failure: Signal interference and false activation
Mitigation: Increase line spacing, add shielding, optimize layout

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±5% line width, ±10% resistance, <1% capacitance variation
Test Method
Electrical parametric testing, Time-domain reflectometry, Scanning electron microscopy

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Word Line

Manufacturer profiles associated with Word Line.

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Frequently Asked Questions

What is the difference between word line and bit line?

Word lines are horizontal conductive paths that select rows of memory cells, while bit lines are vertical paths that carry data to/from individual cells. Together they form the memory array's addressing grid.

Why are word lines critical for memory performance?

Word line resistance and capacitance directly affect access speed and power consumption. Optimized word line design reduces RC delay, enabling faster row activation and lower energy per operation.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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