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QFD
Quality Function Deployment. A methodology for developing products that meet the "voice" or needs of the customer.
QML
Qualified Manufacturer's List per military standard.
QUAD Flat Pack (QFP)
a plastic or ceramic package that has leads that project down and away from all four sides of a square package, typically with gull wing lead configuration.
Qualification methodology
the standard manufacturing method developed by SEMATECH for rigorously characterizing and burning in tools before they are released for production. There are two levels of qualification. Also see Level 1 qualification and Level 2 qualification.
Qualification tests
for fluid or gas distribution systems, extensive, closely controlled tests that completely analyze the characteristics of a component. These tests are performed to qualify a component for use in a high-purity installation.
Quality area
1: that portion of a surface within which specified parameter values apply. 2: in flat panel display substrates, the center area of the substrate where specified substrate quality criteria (with regard to scratch, flatness, stain, bubble, and stone) are applicable.
Quality control
A term denoting the functions or collection of duties that must be performed in order to carry out a company's quality objective. In some companies, quality control refers to a limited function, such as analysis of quality data or inspection of products before shipment to customers and discard or rework of flawed ones.
Quantum device
an electronic device structure, the properties of which derive from the wave nature of electrons.
Quartz (SiO2)
see silicon dioxide.
Quartz carrier
a supporting structure that holds substrates during high-temperature operation. Also called boat.
Quartzware
containers made from amorphous material, which is resistant to high temperature. Examples are the furnace tube and the quartz carrier.
Queue
a waiting line; for example, of materials or of data to be processed.
Queue time
the maximum time allowed by specifications to transpire between two sequential operations. The time in queue may be called out by specification.
Quiet zone
in the bar code marking of silicon wafers, a clear space of consistent background and characteristics that precedes the start character of a symbol and follows the stop character.
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