Knowledge Center

1. Fundamentals and Advantages Femtosecond lasers (10-15s pulse width) enable nonlinear absorption through: Multi-photon ionization (MPI) Avalanche ionization (AI)Key benefits: Near-zero HAZ Sub-micron precision (min. 1μm holes) ...

Controlling the resonance frequency of RF PCB is crucial for ensuring circuit performance and signal integrity. By optimizing through simulation, designers can predict and adjust resonance frequencies during the design phase, improving efficiency and product q...

1. Principles and Applicability of Acoustic Emission (AE) Acoustic Emission detects high-frequency elastic stress waves (20 kHz–1 MHz) emitted during material deformation or failure. In HDI boards, micro-crack propagation (from thermal/mechanical stre...

1. Definition and Generation Mechanism PIM refers to the generation of additional frequency components when two or more signals interact in passive components (e.g., connectors, antennas, PCB traces) due to nonlinear characteristics. These nonlinearities ma...

1. Background & Core Issues In multilayer PCB manufacturing, lamination bonds inner cores, prepreg, and copper foil under heat/pressure. Contaminants (oils, oxides, dust) on surfaces before lamination cause: Weak interfacial adhesion: Leading to delami...

1. Common Sense of Incoming Material Inspection (1) General Steps of Incoming Material Inspection Incoming materials → Prepare inspection tools → Overall inspection Is the outer packaging intact? Is the LABEL clear and correct? Is the inner pac...

1. Principles and Advantages of Femtosecond Laser Ablation Femtosecond lasers (10⁻¹⁵ s pulse width) enable nonlinear absorption (e.g., multiphoton ionization, avalanche ionization) with near-zero HAZ due to: Non-thermal dominance: Energy depos...

1. PTFE Surface Challenges PTFE’s low surface energy (18–24 mN/m) and chemical inertness lead to: Weak adhesion: Lack of functional groups for chemical bonding; Poor wettability: Contact angle >110°; CTE mismatch: PTFE (100&nd...

1. Properties and Advantages of Supercritical CO₂ Supercritical CO₂ (scCO₂) combines gas-like diffusivity (≈10⁻⁷ m²/s) and liquid-like solvation power (solubility parameter≈0.5–2.5 (cal/cm³)¹/²) above its crit...

1. Principles and Advantages of Cold Spray Cold Spray is a solid-state deposition process where metal powders (e.g., Cu) are accelerated by high-pressure gas (N₂/He) to supersonic speeds (300–1200 m/s), forming dense coatings via plastic deformation...