PCB Glossary

Outgassing

The gaseous emission from a laminate printed board or component when the board or the printed board assembly is exposed to heat or reduced air pressure or both.

Outgassing

PCB Glossary

OSP

Organic Solderable Preservative.

OSP

PCB Glossary

Organic Activated (OA)

A water-soluble flux using organic acids as activators.

Organic Activated (OA)

PCB Glossary

Open

An area of a bare PCB which, due to over-etching or fabrication problems, separates two electrically connected points.

Open

PCB Glossary

One-sided Board

See Single-sided Board.

One-sided Board

PCB Glossary

Omegameter

A test instrument measuring ionic residues on PCBs via the drop of resistivity over a specific time.

Omegameter

PCB Glossary

NPTH

Non plated though-hole.

NPTH

PCB Glossary

Non-wetting

A condition whereby a surface has contacted molten solder, but has had none of the solder adhere to it.

Non-wetting

PCB Glossary

Non-polar Compound

Material having electrical charges distributed over the surface of the molecule, thereby showing an electrical effect in solution.

Non-polar Compound

PCB Glossary

Non-functional Land

A land on internal or external layers, not connected to the conductive pattern on its layer.

Non-functional Land

PCB Glossary

Non-conductive Pattern

A configuration formed by functional non-conductive material of a printed circuit.

Non-conductive Pattern

PCB Glossary

Non-conductive Epoxy

An epoxy resin with or without a filler, which may be added to improve thermal conductivity.

Non-conductive Epoxy

PCB Glossary

Non-clean solder

A process using specially formulated low-solid solder pastes whose residues require no cleaning.

Non-clean solder

PCB Glossary

Node

A pin, lead or even junction which will have at least one wire connected to it.

Node

PCB Glossary

NFP

Non-functional pad.

NFP

PCB Glossary

Neutralizer

An alkaline chemical added to water to improve its ability to dissolve flux residues.

Neutralizer

PCB Glossary

Netlist

A net is a junction of component nodes. A netlist is a collection of nets that define all the connections in a circuit. It is obtained automatically from a schematic capture program.

Netlist

PCB Glossary

Negative–acting Resist

A resist which is polymerized (hardened) by light and which, after exposure and development remains on the surface of a laminate in those areas which were under the transparent parts of a production ,...

Negative–acting Resist

PCB Glossary

Negative (Noun)

An artwork, artwork master, or production master in which the intended conductive pattern is transparent to light, and the areas to be free from conductive material are opaque.

Negative (Noun)

PCB Glossary

Nail Heading

The flared condition of copper on the inner conductor layers of a multi-layer board usually caused by hole drilling.

Nail Heading

1 ... 60 61 62 63 64 65 66 67 68 69 70 ...
Ranking Name Answers
1 (DIY) C64iSTANBUL 1
Back to top