stepperˈstɛp ər
stepper
English Definitions:
hoofer, stepper (noun)
a professional dancer
stepper, stepping motor (noun)
a motor (especially an electric motor) that moves or rotates in small discrete steps
stepper, high stepper (noun)
a horse trained to lift its feet high off the ground while walking or trotting
stepper (Noun)
A dancer.
stepper (Noun)
A person or animal that steps energetically or high.
stepper (Noun)
A kind of electric motor (a stepper motor) that advances in steps rather than smoothly.
stepper (Noun)
A device used in the manufacture of microcircuits to apply a photolithographic image repeatedly, at regular intervals (by imaging, moving a step and repeating).
Stepper
A stepper is a device used in the manufacture of integrated circuits that is similar in operation to a slide projector or a photographic enlarger. Steppers are an essential part of the complex process, called photolithography, that creates millions of microscopic circuit elements on the surface of tiny chips of silicon. These chips form the heart of ICs such as computer processors, memory chips, and many other devices.
Stepper
A stepper is a device used in the manufacture of integrated circuits (ICs) that is similar in operation to a slide projector or a photographic enlarger. Stepper is short for step-and-repeat camera. Steppers are an essential part of the complex process, called photolithography, which creates millions of microscopic circuit elements on the surface of silicon wafers out of which chips are made. These chips form the heart of ICs such as computer processors, memory chips, and many other devices. The stepper emerged in the late 1970s but did not become widespread until the 1980s. This was because it was replacing an earlier technology, the mask aligner. Aligners imaged the entire surface of a wafer at the same time, producing many chips in a single operation. In contrast, the stepper imaged only one chip at a time, and was thus much slower to operate. The stepper eventually displaced the aligner when the relentless forces of Moore's Law demanded that smaller feature sizes be used. Because the stepper imaged only one chip at a time it offered higher resolution and was the first technology to exceed the 1 micron limit. The addition of auto-alignment systems reduced the setup time needed to image multiple ICs, and by the late 1980s, the stepper had almost entirely replaced the aligner in the high-end market. The stepper was itself replaced by the step-and-scan systems (scanners) which offered an additional order of magnitude resolution advance, and work by scanning only a small portion of the mask for an individual IC, and thus require much longer operation times than the original steppers. These became widespread during the 1990s and essentially universal by the 2000s. Today, step-and-scan systems are so widespread that they are often simply referred to as steppers.
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