stack

(redirected from stackup)
Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.
Drug slang A regional term for marijuana
Imaging A descriptive term for the incomplete filling and parallel spiculation of plical folds seen in radiocontrast studies of the small intestine—which is most striking in the jejunum, given the prominence of plical folds—which corresponds to a thickening of the wall by either intramural haemorrhage or haematoma, related to anticoagulants, blood dyscrasia, trauma, Meckel’s diverticulum, endometriosis, or infiltration of the intestinal wall, as in lymphoma
Sports medicine Body-building noun A large amount of performance-enhancing drugs (anabolic steroids) verb To ingest or inject a large amount of anabolic steroids to increase one’s muscle mass

stack

(stăk) [ME. stak]
1. To place objects directly on top of others.
2. To perform a procedure immediately after a preceding one, without interruption or pause.

stack

(stak)
To build up porcelain in the shape of a tooth in the fabrication of a tooth crown.

stack,

n a set of metal strips that is inserted into ultrasonic and sonic instruments. A stack converts magnetic fields into vibrations that move the tip of the instrument.
References in periodicals archive ?
For MCMs and BGAs, the important elements of the simulation are the dielectric stackup definition and the description of a 3D structure in two dimensions.
For an inner layer, sandwiched between a uniform ground layer and a plane with multiple power islands, a logical strategy is to design the stackup with the inner signal layer placed close to the solid ground and far from the split power plane.
The fabricator can offer helpful feedback to the designer regarding PCB stiffness, bend requirements, keep-out regions, material, stackup, and much more.
One of the best ways to address these signaling issues is to make sure that the right materials are selected and that the layers in the stackup are arranged properly.
To combat this problem the design team has had to take into consideration, and therefore need to control, the effects of the board stackup, routing, placement, etc.
Other features include PCB stackup visualization, a bidirectional interface to create, predict and define all materials and configurations of PCB materials; PCB batch card management; and mechanical CAD management.
Elimination of tolerance stackup or accumulation from the nonfunctional surface.
Typically a die stackup consists of eight or fewer die, but a more complex die stackup can consist of up to 64 die.
Prior to each analysis stage, product modeling adds attributes to the manufacturing data, which enables comprehensive DfM checks to be executed, and also defines exactly what is to be manufactured such as layer stackup, copper weights, solder mask color and component assembly instructions.
Elimination of these decap structures might allow for easier routing of traces within the same area, which could potentially reduce the required number of layers in the PCB stackup.
A mechanical 3D FEA model is created matching the real dimensions of the configuration in the stackup of die, die attachment material, substrate, substrate attachment material, and heat sink.