| D |
| D CODE |
A datum in a Gerber file which acts as a command to a photoplotter/laserplotter. |
| DARPA |
Department of Advanced Research Projects Agency |
| DCA |
Direct Chip Attach |
| DESIGN VALIDATION |
Provides a process that subjects a design to a series of stress tests to determine its robustness. |
| DESMEAR |
Removal of epoxy smear (melted resin) and drilling debris from a hole wall. |
| DFA |
Design For Assembly |
| DFM |
Design For Manufacturability |
| DFT |
Design for test |
| DI |
De-ionized Water |
| DICY |
Dicyandiamide, the most common cross-linking agent used in FR-4. |
| DIELECTRIC CONSTANT |
The ratio of the capacitance of a capacitor with the given dielectric to the capacitance of a capacitor having air for its dielectric but otherwise identical. |
| DIGITAL CIRCUIT |
A circuit which operates like a switch (it is either “on or “off”), and can make logical decisions. |
| DIMM |
Dual In-Line Memory Module: a small circuit board that holds memory chips a single in-line memory module (SIMM) has a 32-bit path to the memory chips whereas a DIMM has 64-bit path. Because the Pentium processor requires a 64-bit path to memory, you need to install SIMMs two at a time. With DIMM's, you can install memory one DIMM at a time. |
| DIP |
Dual In-Line Package. A type of housing for integrated circuits. |
| DMAB |
Dimethylamine Borane |
| DOCK-TO-STOCK |
A supplier quality management practice that allows a component or product to enter into a company without going through an incoming inspection upon arrival at the receiving dock. |
| DOS |
Disk Operating System |
| DOUBLE-TRACK |
Slang for designs with two traces between DIP pins, hole centers. |
| DRAM |
Dynamic Random Access Memory: a type of memory used in most personal computers. |
| DRC |
Design Rule Check |
| DRY FILM SOLDER MASK |
A solder mask film applied to a printed board with photographic methods. |
| DSP |
Digital signal processor |
| DTF |
Double-treated foil |
| DUT |
Device Under Test. A DUT board is used in automated testing of integrated circuits. |
| DWDM |
Dense wave division multiplexer |
