by John Walt Childers, IPC-CID, Founder of Golden Gate Graphics
Golden Gate Graphics is an official Altium Service Bureau
Terms that contain digits are alphabetized as if the numeric characters were spelled in English.
Terms with two or more words are alphabetized "dictionary style." They are alphabetized as though the spaces between the terms have been removed.
If there are other characters in the term, such as a slash (/), these are treated the same as spaces and ignored for the purpose of alphabetizinig.
aperture list aperture table
aperture wheel ARM artwork ASCII ASCII text assembly assembly drawing assembly house ASTM AT cut ATC ATE AWG auto router
ablation (u-BLAY-shən) Pronunciation Key noun [PCB Manufacturing] (In the context of "laser ablation" in the making of blind and buried vias) Vaporization.
A PCB designer should be aware that a hole caused by ablation has an inverted cone shape rather than a cylindrical shape, as would be the case with a hole drilled with a bit. Partly because of this, a laser-ablated hole can not have an aspect ratio greater than 1:1. In contrast, a drilled hole can have an aspect ratio of 10:1 or greater (or less for some board houses). Therefore, laser-ablated holes are only feasible in build-up manufacturing. The padstack for a laser-ablated via can have a smaller pad on the tapered end than on the large (the starting point) end. This fact can be helpful in designing a space transformer.
active component (AK-təv KOM-poh-nənt) Pronunciation Key
active heatsink (AK-iv HEET-seenk) Pronunciation Key noun [Components] A heatsink which uses an applied energy to operate.
Examples are 1) a mini-fan attached to a chip package and 2) a TEC with a fan to blow away generated heat.
alumina A ceramic used for insulators in electron tubes or substrates in thin film circuits. It can withstand continuously high temperatures and has a low dielectric loss over a wide frequency range. Aluminum oxide (Al 2 O 3 )
anode (AN-ohd) Pronunciation Key
ANT (ANT) Pronunciation Key noun [Communications Technology] Adaptive Network Technology. A radio transceiver protocol, ANT is a proprietary wireless sensor network technology featuring a wireless communications protocol stack that enables semiconductor radios operating in the 2.4 GHz Industrial, Scientific and Medical allocation of the RF spectrum ("ISM band") to communicate by establishing standard rules for co-existence, data representation, signalling, authentication and error detection.
ANT is ported to a semiconductor transceiver from a specialist manufacturer (typically Nordic Semiconductor of Oslo, Norway) for practical implementations. ANT is characterized by a low computational overhead, and high efficiency that results in low power consumption by the radios supporting the protocol.
antipad (ANT-tee-pad) Pronunciation Key noun [PCB Manufacturing] The diameter of the copper free area around a plated-through hole (PTH) in a power plane, which electrically isolates the PTH from the power plane.
In a negative image power plane, an
Altium design rules - power plane clearance
aperture (A-pə-chər) Pronunciation Key
aperture list (A-pə-chər list) Pronunciation Key
aperture wheel A component of a vector photoplotter , it is a metal disk having cut-outs with brackets and screw holes arranged near its rim for attaching apertures. Its center hole is attached to a motorized spindle on the lamp head of the photoplotter. When a D code denoting a particular position on the wheel is retreived from a Gerber file by the photoplotter, the wheel is caused to rotate so that the aperture in that position is placed between the lamp and the film.
In preparation for a photoplotting, the aperture wheel is set up by a technician who reads a printed aperture list , selects the correct aperture from a set of them stored in a box with compartments and, using a small screw driver, installs the aperture onto the position on the wheel which is called for on the list. This process is subject to human error and is one of the disadvantages of vector photoplotters as compared with laser photoplotters.
artwork Artwork for printed circuit design is photoplotted film (or merely the Gerber files used to drive the photoplotter), NC Drill file and documentation which are all used by a board house to manufacture a bare printed circuit board. See also Valuable Final Artwork.
ASCII American Standard Code for Information Interchange. A text and control-code character set used in computers. Pronounced "ASS-key."
(Note: The following description is excerpted from "FOLDOC," Free Online Dictionary of Computing. The links in this definition point to FOLDOC and will take you off this site unless you right-click on the link and select "Open link in new tab" .)
ASCII is the basis of character sets used in almost all present-day computers. US-ASCII uses only the lower seven bit s (character points 0 to 127) to convey some control codes , space, numbers, most basic punctuation, and unaccented letters a-z and A-Z. More modern coded character sets (e.g., Latin-1 , Unicode ) define extensions to ASCII for values above 127 for conveying special Latin characters (like accented characters, or German ess-tsett), characters from non-Latin writing systems (e.g., Cyrillic, or Han characters ), and such characters as distinct open- and close-quotation marks ( and ), ¾ and ®.
assembly house A manufacturing facility for attaching and soldering components to a printed circuit. Aka assembler and also CM, for contract manufacturer.
AT cut (AY-TEE-KUT) Pronunciation Key noun [Crystallography] (Of piezoelectric crystals) One of the designations for the orientation of the piezoelectric crystal plate with respect to the axes of the crystal.
The AT cut results in a crystal with stable resonant frequency at or close to room temperature. For a high temperature environment, stress-compensated (SC) crystals are available with a special cut that minimizes the frequency changes due to temperature gradients. Graf_ Rudolf_F_MDE_Newnes_1999
noun [Physical Testing] Accelerated Thermal Cycle (or Cycling), a product reliability test.
Accelerated thermal cycling is accomplished by raising and lowering the temperature of a test object to extremes and more rapidly than would be found in nature or industrial environments. An example: Accelerated Thermal Cycling (ATC) could be carried out between 0˚C and 100˚C with 10 minute ramps, a 10 minute cold dwell and 10-minute hot dwell or 60-minute hot dwell. Test frequencies could be 16 and 36 cycles/day for the 60-minute and 10-minute dwell test profiles respectively. Clech_Jean-Paul_AFTCTELA_EPSI_2005
AWG American Wire Gauge. A PCB Designer needs to know diameters of wire gauges to properly size E-pads. The American Wire Gauge, formerly known as the Brown and Sharpe (B + S) Gauge, originated in the wire drawing industry. The gauge is calculated so that the next largest diameter always has a cross-sectional area that is 26% greater.
This is the best, most usable dictionary for electronics, because its
definitions help you grasp the terms and therefore the subject. Lesser
dictionaries define electronics terms with even more difficult technical
jargon, leading one into endless "word chains." Not this one.
You can buy the Modern Dictionary of Electronics new or used via the Internet.
You need a big, comprehensive dictionary. Get this one. Despite being a big dictionary, The Random House has great definitions, quick to grasp.
Although out of print, as of 2020 you could still buy a great used copy online for $30 including shipping or possibly for much less. Two versions are available of the 2nd Edition, Unabridged: