IPC-T-50F_.pdf.pdf - 第21页
Conductor Track 22.0261 see ‘ ‘Conductor .’ ’ Conductor Width 60.1364 The observable width of a conductor at any point chosen at random on a printed board as viewed from directly above unless otherwise specified. (See als…
Computer-Aided Design (CAD) 22.1359
The interactive use of computer systems, programs, and
procedures in the design process wherein, the decision-
making activity rests with the human operator and a com-
puter provides the data manipulation function.
Computer-Aided Engineering (CAE) 21.1360
The interactive use of computer systems, programs, and
procedures in an engineering process wherein, the
decision-making activity rests with the human operator and
a computer provides the data manipulation function.
Computer-Aided Manufacturing (CAM) 25.1361
The interactive use of computer systems, programs, and
procedures in various phases of a manufacturing process
wherein, the decision-making activity rests with the human
operator and a computer provides the data manipulation
functions.
Concentration Polarization 54.0245
That portion of polarization electrode produced by concen-
tration changes at the metal-environment interface.
Condensation Soldering 75.1681
see ‘‘Vapor Phase Soldering.’’
Conditional End-of-Test 25.0246
A command in a test program to stop the execution of the
program when a particular condition, or set of conditions,
is reached.
Conditioning 92.0247
The time-related exposure of a test specimen to a specified
environment(s) prior to or after testing and before evalua-
tion.
Conducting Salt 54.0248
A salt added to a plating solution in order to increase its
conductivity.
Conductive Foil 45.0249
A thin sheet of metal that is intended for forming a conduc-
tive pattern on a base material.
Conductive Pattern 22.1362
The configuration or design of the conductive material on
a base material. (This includes conductors, lands, vias,
heatsinks and passive components when these are integral
part of the printed board manufacturing process.)
Conductivity (Electrical) 40.0250
The ability of a substance or material to conduct electric-
ity.
Conductor 22.0251
A single conductive path in a conductive pattern.
Conductor Base Spacing 60.0252
The spacing between conductor at the plane of the surface
of a base material. (See also Design Spacing of Conduc-
tors.’’)
Conductor Base Width 60.0253
The width of a conductor at the plane of the surface of a
base material. (See also ‘‘Conductor Width’’ and ‘‘Design
Width of Conductors.’’)
Conductor Layer No.1 25.0254
The first layer of a printed board that has a conductive pat-
tern on or adjacent to its primary side.
Conductor Line 22.0256
see ‘‘Conductor.’’
Conductor Layer 22.0848
The total conductive pattern formed on one side of a single
layer of a base material. (This may include all or a portion
of ground and voltage planes.)
Conductor Path 22.0257
see ‘‘Conductor.’’
Conductor Pattern 22.0258
see ‘‘Conductive Pattern.’’
Conductor Side 22.0259
The side of a single-sided printed board that contains the
conductive pattern.
Conductor Spacing 60.1363
The observable distance between adjacent edges (not
center-to-center spacing) of isolated conductive patterns in
a conductor layer. (See Figure C-5.) (See Also ‘‘Center-to-
Center Spacing.’’)
Conductor Thickness 22.1707
Thickness of a conductor including additional metallic
coatings but excluding non-conductive coatings.
IPC-I-001026
Figure C–5 Conductor spacing
Spacing
Spacing
▼
▼
▼
▼
IPC-T-50F June 1996
16
Conductor Track 22.0261
see ‘‘Conductor.’’
Conductor Width 60.1364
The observable width of a conductor at any point chosen at
random on a printed board as viewed from directly above
unless otherwise specified. (See also ‘‘Design Width of
Conductor’’ and ‘‘Conductor Base Width.’’)
Confidence Interval 94.1365
The determination, with a specified degree of confidence,
as to whether or not a particular characteristic is within
ascertained limits of a population.
Confirmation Run 94.0262
A test of the results that are obtained during an experimen-
tal design in order to prove if the results are reproducible
in an actual application.
Conformal Coating 76.0263
An insulating protective covering that conforms to the con-
figuration of the objects coated (e.g. Printed Boards,
Printed Board Assembly) providing a protective barrier
against deleterious effects from environmental conditions.
Confounding 94.0264
A situation whereby certain effects cannot be separated
from other effects.
Connector 37.0265
A device used to provide mechanical connect/disconnect
service for electrical terminations.
Connector Area 22.0269
That portion of printed wiring used for the purpose of pro-
viding external connections.
Connector Contact 22.0270
The conducting member of a connecting device that pro-
vides a separable connection.
Connector Housing 37.0271
A plastic shell that holds electrical contacts in a specific
field pattern that may also have polarization/keying bosses
or slots.
Connector, One-Part 22.0266
see ‘‘Edge-Board Connector
Connector Tang 37.0272
That portion of a printed board that mates with an edge-
board connector.
Connector, Two-Part 22.0267
A connector containing two sets of discretely-formed mat-
ing metal contacts.
Connector, Two-Part, Printed Board 37.0268
A two-part connector wherein at least one set of contacts is
mechanically and electrically attached to a printed board.
Constraining Core 44.0273
A supporting plane that is internal to a packaging and inter-
connecting structure.
Consumer’s Risk 94.0274
see ‘‘Beta Error.’’
Contact Angle (Bonding) 74.0275
The angle between the bonding lead or wire and the bond-
ing land.
Contact Angle (Soldering) 75.1326
The angle of a solder fillet that is enclosed between a plane
that is tangent to the solder/basis-metal surface and a plane
that is tangent to the solder/air interface. (See Figure C-6.)
Contact Area 22.0276
The common area between a conductor and a connector
through which the flow of electricity takes place.
Contact Corrosion 96.0277
see ‘‘Crevice Corrosion.’’
Contact Length 96.0278
The distance of travel made by a contact in touch with
another during the insertion and removal of a connector.
Contact Printing 24.1366
A photographic light-exposure process that transfers an
image from one base material to the photosensitive surface
of another base material while both base materials are in
mechanical contact with each other.
Contact Resistance 70.0279
The electrical resistance of metallic surfaces, under speci-
fied conditions, at their interface in the contact area.
Contact Retention Force 96.0280
The minimum axial load in either direction that a contact
withstands while it is in its normal position in a connector
insert.
Contact Spacing 22.0281
see ‘‘Pitch.’’
Contact Spring 37.0282
The spring member of a socket-type contact that forces the
engaging pin- type contact into a position of positive inti-
mate contact.
Contamination Host Material 76.0283
The material within which contamination is deposited or
entrapped.
June 1996 IPC-T-50F
17
Continuity 92.0284
An uninterrupted path for the flow of electrical current in a
circuit.
Contract Services 17.0285
Printed-board manufacturing processing operations that are
performed for by another vendor outside the manufactur-
er’s facility.
Control Chart 91.1368
A graphic representation of a characteristic of a process
that shows plotted values of some statistic gathered from
characteristic, a central line, and one or two statistically-
derived control limits.
Control Console 11.0286
A device terminal used to manipulate and maintain the
operating system of a computer.
Control Drawing 22.0287
see ‘‘Master Drawing.’’
Control Limits 91.0290
The maximum allowable variation of a process characteris-
tic due alone to common causes.
Controlled Collapse, Component Connection 75.0289
see ‘‘Controlled Collapse Soldering’’
Controlled Collapse Soldering 75.0288
The making of termination by controlling the height of sol-
der balls in a flip-chip assembly operation.
Convected Energy 75.1736
Heat transferred through circulation of fluid or gas.
Conveyor, Edge 70.0291
A transporting mechanism that supports a product by the
edges.
Conveyor, Mesh 70.0292
A transporting mechanism that fully supports the product.
Conveyor, Secondary 70.0293
A transporting mechanism used beneath the edge conveyor
to catch a fallen product.
Coordinatograph 92.0294
An X- and Y-coordinate plotting and measuring machine.
Coplanar Leads 33.0295
The flat beam leads of a component package that have been
formed so that they can simultaneously contact one plane
of a base material.
Copolymerize 49.0847
The creation of a polymer by the joining of two or more
different monomers in repeating chain.
Copper-Mirror Test 92.0296
A test of the corrosivity of a flux on a copper film that is
vacuum- deposited on a glass plate.
Corner Marks 22.0297
The marks at the corners of artwork whose inside edges
establish, or help to establish, the borders and contour of a
printed board.
Coronizing 44.0298
Continuous heat cleaning and weave setting.
Corrosion (Chemical/Electrolytic) 76.0299
The attack of chemicals, flux, and flux residues on base
metals.
Corrosive Flux 75.0300
Flux that contains levels of halides, amines, or organic
acids that cause corrosion of copper.
Cosine Law (Illumination) 24.1369
A law of illumination that states that the flux radiated or
received in a given direction varies with the projected area
of the receiver or emitter in a plane that is perpendicular to
the direction of the flux.
Cost of Quality 94.0301
The money spent in the creation, control, and evaluation of
quality and the consequences of the failure to meet speci-
fied requirements.
Coupon 92.0302
see ‘‘Test Coupon.’’
Coupon (Breakaway) 92.1220
Coupons made as an integral part of the end product board
and connected as one piece, except one edge of the coupon
has perforations or a thin section connected to the board
which can be easily broken off without damaging either the
coupon or the board.
Cover Coat 42.0303
see ‘‘Cover Lay.’’
IPC-I-001152
Figure C–6 Soldering contact angle
IPC-T-50F June 1996
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