Printed Circuit Assembling TRIZ Cases

Dual-melting-point solder pastes let stacked PCBs be assembled in one reflow flow, cutting line complexity while preserving soldering quality.

Using low- and high-temperature solders in staged PCB reflow protects temperature-sensitive components while avoiding joint reflow and thermal warpage.

Compressed-air pumping pads stabilize chamber pressure to mix and discharge solder paste evenly, reducing print defects, waste, and cleaning effort.

Porous EPS cores and copper-nickel-gold shells improve solder ball calibration, cut cost, and reduce thermal expansion mismatch in board assembly.

Individually controlled curtain segments match each assembly profile to limit protective gas escape and keep the chamber atmosphere stable.

Laser-kept liquefied solder is jetted into pin through holes to improve annular-gap fill, shorten soldering time, and support in-situ joint checks.

A flexible stamped-metal heat spreader and cured-liquid TIM layout cut thermal stress on PCB solder joints during enclosure thermal cycling.

Plated wiring on an injection mold enables direct component mounting, using tailored solder pastes and induction heating to save PCB space.

Segmented pressing first relieves tension in pad-free areas, then aligns and bonds flexible PCB electrodes to maintain reliable display connections.

A necked fastener and bracket let one electronic component be replaced without disturbing another, reducing movement and damage during repair.

Ge in a Sn-In solder forms a thin amorphous oxide film that limits oxidation, preserves high-temperature solderability, and avoids Bi alpha-ray issues.

Pre-placing solder opposite the feed point helps through-hole land soldering spread evenly, avoiding metal exposure and board burning.

Predicted BGA warpage is countered by via suction during reflow, reducing solder defects and preserving electrical connections.

A two-step laser heating process changes beam diameter by Z-axis motion to avoid substrate scorching, residue scattering, and solder balls.

Contactless inductive coils and rotating conductive targets detect throttle position without wear or stray magnetic field interference.

Individually adjustable curtain segments match each assembly profile to limit protective gas escape without causing component wear or displacement.

A non-convex solder joint formed by stencil aperture control reduces interface stress and crack growth during PCB thermal cycling.

Controlled air injection oxidizes probe deposits to restore zirconia oxygen sensing online without stopping reflow oven operation.

Limiting conduction patterns to the bare-chip mounting region prevents unintended contact during bending and improves electrical reliability.

A curved releasing tip helps transfer solder paste without crushing solder balls, improving deposit consistency and reducing cleaning.

Sensor-fed PCB digital twins use physics-based models and failure history to forecast degradation under temperature, vibration, and humidity.

Bypass channels and a heat exchanger stabilize cooling gas between successive boards, limiting oxidation and improving flux recovery.

Replacing Bi with In in a SAC-based solder alloy suppresses through-hole lift-off while keeping conventional reflow temperature and joint strength.

3D-printed pallet geometries guide solder through channels, tunnels, and ramps to prevent clogging and improve pin-through-hole connections.

Time-synced full-board images and soldering monitor data improve board position traceability and chronological work review.

Mixed molten solder from two supply ports stays attached to the substrate, suppressing oxide formation and improving clean solder attachment.

Slope-based inspection finds concave solder surface regions to judge wettability defects more accurately than height-based checks.

Parallel UV laser heads and vacuum suction fixtures drill multiple FPC boards at once, raising precision drilling throughput and handling varied board sizes.

An airtight resin body shields mixed metal powders from oxidation, enabling flux-free bonding and stronger heat-resistant intermetallic joints.

A mixed hydroxy-solvent flux suppresses crystallization during cold storage, preserving solder paste viscosity and printability.

Oversized spherical particles in solder paste create venting channels under low-profile PCB components, reducing flux residue corrosion and solder collapse.

Preformed intermetallic and lead-rich solder layers restrain grain coarsening and preserve joint strength under heat cycles.

Fine filtration removes solids from molten lead-free solder, while a fatty acid surface layer improves flow, appearance, and PCB mounting reliability.

A silver-bismuth-copper-nickel tin alloy balances wetting and creep resistance for solder joints operating above 150°C without lead or antimony.

Fine-grained Sn and transition-metal alloy intermetallics improve high-temperature deformability and resist brittle fracture in joined bodies.

Equal-length, equal-width wires linked to conductive pins keep multilayer carrier board impedance uniform for more accurate high-frequency signals.

A deformable load control portion limits transfer force below the damage threshold, enabling reliable repair of microelements without sensors.

Two chip components are soldered in series on the original PCB land to tune resistance or capacitance without jumper wires or footprint growth.

A weakly adherent base-resin boundary creates a gas path that vents electrolyte vapor and helps maintain insulation resistance between leads.

A tailored epoxy and phenolic resin mix delays curing until SAC solder melts, improving joint formation and heat resistance.

Ultrasonic nozzle vibration and pressurized gas meter solder balls accurately while maintaining a stable filling level with less refilling.

Visual contact mapping generates corrected XYRS data so PCB components align with actual pad locations despite skew and tolerance errors.

Laser-transferred solder paste is printed onto components with controlled gap and imaging to avoid stencil defects and jet clogging in SMT assembly.

Layer-by-layer warpage simulation predicts high-risk PCB regions before reflow, enabling process adjustments that protect welding quality and yield.

Customized 3D-printed heat shields insulate thermally sensitive PCB components during reflow and wave soldering without contamination.

Segmented exhaust pipelines and a blocked exhaust zone remove volatile pollutants while preserving inert gas and accurate reflow temperature profiling.

Modular fins and a removable fastening assembly let this reflow oven end barrier box be cleaned easily while maintaining an effective gas curtain.

Real-time image and temperature feedback validates solder liquidus and IMC thickness to improve PCB solder joint consistency.

Movable and multiple flux ejection ports spread viscous fluid across the tray, cutting rotation cycles and film thickness adjustment time.