Electronics manufacturing terms.

Concise technical explanations covering soldering, coating, dispensing, marking, inspection and equipment integration.

Assembly: A populated PCB or other assembled unit handled as the workpiece. Equipment selection must consider its real outer dimensions, including panel, carrier and component protrusions.
Coating inspection: Optical inspection after conformal-coating application. Depending on the coating, lighting and program, it can evaluate presence, contour and visible deviations.
Conformal coating: Selective or area-based protective coating of electronics assemblies. Connectors, test points and other keep-out zones are deliberately left clear.
Dispensing: Controlled application of a liquid or paste as a dot, bead or area. Material behaviour, valve, motion and curing together define the process.
Drop-jet fluxer: A system for contactless, targeted application of small flux quantities to programmed areas of the assembly.
Fiducial: An optical reference mark on a PCB or panel. A camera uses it to detect positional variation and correct coordinates for marking, dispensing or inspection.
Flux: A soldering aid that reduces oxides and supports wetting. Type, amount, activation and residues must suit the solder, assembly and process.
Gerber data: An established format for two-dimensional PCB fabrication data. Traditional layers describe copper, solder mask and legend artwork; X2 adds attributes and X3 can include component layers. Drill data, BOM, placement coordinates and inspection rules may still be required separately.
The Hermes Standard: A communication standard for transferring PCBs and associated data between machines in an SMT line. Support must be confirmed for the specific equipment configuration.
Inline equipment: Equipment connected to the material flow of a production line. Transfer height, direction, buffering and communication interfaces are part of the integration.
Keep-out zone: An area that must remain free of coating, solder, adhesive, potting material or marking. It is defined in a drawing, data set or process program.
Laser marking: Contactless creation of text, serial numbers or machine-readable codes on a suitable material. Markability, contrast and surface effects require testing on the actual material.
Offline equipment: A standalone production cell without direct transfer from an adjacent machine. Loading, unloading, buffers and operator time affect real throughput.
Panel: Multiple PCBs combined into a larger unit for production and transport. The complete panel dimensions are relevant to equipment selection.
Process window: The range of parameters in which a process meets its defined quality requirements. A robust window tolerates normal variation without violating release criteria.
Selective soldering: Targeted soldering of defined through-hole joints. Typical stages are local flux application, preheating and soldering with a guided mini-wave.
SMEMA: An established electrical interface for basic handover control between machines in an electronics assembly line. It does not by itself provide comprehensive product and process data exchange.
Cycle time: The intended interval at which a workpiece or panel leaves a defined production step. Process, handling, changeover and buffers must be included in the calculation.
THT: Through-hole technology: component leads pass through drilled holes in the PCB and are connected on the solder side.
Traceability: Tracking materials, assemblies and process steps through a unique identification and linked records. Scope and retention follow the quality concept.
Unique ID: A unique identifier for an assembly or production unit. Defined assignment and linkage to records make it useful for traceability.
UV fluorescence: The visible response of certain coatings under UV illumination. It can support optical detection but does not alone prove protective performance.
Wave soldering: A process in which the suitable solder side passes over one or more solder waves. Layout, masking, transport and thermal design determine suitability.

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