Knowledge Center

I. Core Principles Geometric Nesting Optimization Shape Complementarity: Interlock curved parts with straight-edged parts (e.g., gear embedded in rectangular slot). Rotation Matching: Allow part rotation (0°/90°/180°) (Example: L...

1. Resistance Calculation Core Formula:R=ρ⋅LW⋅T(Unit: Ω) ρ: Sheet resistance (Ω/□) L: Length (mm) W: Width (mm) T: Thickness (μm) Process Compensation:Ractual=Rdesign⋅(1+α&sdot...

1. SSN Mechanism & EBG Principle SSN Generation:Vnoise=Lloop⋅N⋅dIdt​ Lloop: P/G loop inductance (0.5-2nH) NN: Simultaneously switching gates dI/dt: Current slew rate (up to 1A/ns) EBG Bandgap Property: Freq...

1. Antenna Effect Mechanisms Unintentional Antennas: Trace length L≥λ/10L≥λ/10 becomes radiator Loop area A≥0.01λ2A≥0.01λ2 forms magnetic dipole Key Formulas:fres=c2Lεeff(trace resonan...

1. CAF Mechanism & Ion Migration Electrochemical Path:Anode:Cu→Cu2++2e−Cathode:2H2O+2e−→2OH−+H2​ Ion Migration Rate (K):K=ΔLΔt⋅E(Unit:μm2/V⋅s) ΔL: Dendrite length (μm) &Del...

1. Thickness Control Principles Deposition Kinetics: δδ: Thickness (μm) kk: Rate constant (0.15±0.02) CAgCAg​: Ag⁺ concentration (g/L) tt: Immersion time (s) EaEa​: Activation ener...

1. Plasma Mechanisms & Adhesion Correlation Principles: Physical Bombardment: Ar⁺ ions remove contaminants (>90% efficiency) Chemical Activation: O₂ radicals generate -OH/-COOH groups ↑ surface energy Key Metrics: ...

1. Causes of Flow Non-Uniformity Factor Mechanism Contribution Temperature gradient Local viscosity variation >30% 40%~50% Bump array shadowing Flow resistance difference >5x 20%~35% Substrate surface energy Contact angle...

1. Failure Mechanisms & Requirements Failure Mode Trigger Condition Material Requirement Adhesive cracking Thermal cycling (-40~150℃) CTE≤60ppm/°C Strength degradation 150℃×1000h aging Strength retention ≥80...

1. Coplanarity Definition & Impact Coplanarity:Max-Min bump height variation ≤5μm Failure Risks: Deviation Effect 5~10μm Voiding >15% >10μm Die cracking (↑300% thermal stress) 2. Bump Fabric...