Question

The manufacture of flat panel displays includes two basic steps:
(1) fabrication of the display, in which many pixels are fabricated on a glass substrate, and
(2) assembly of the display into a housing containing the driver chips. Suppose for the fabrication step there is an upper specification limit on the number of failed pixels per display.
Assume failed pixels exceeding the spec limit is the only failure mechanism in fabricating the display. Suppose the process performance index for fabrication is 0.8. In the assembly step, suppose there are upper and lower specification limits on the current drawn by the driver chips in an assembled unit. Assume exceeding the spec limits for current is the only failure mechanism in the assembly step. Suppose the assembly step has a process capability index of 1.4 and a process performance index of 0.9. What is the yield of manufacturing flat panel displays?

Answer 1

Display pixels driven by silicon thin film transistors are fabricated on plastic substrates for use in active matrix displays, such as flat panel displays.

What are specification limits?

The objectives that customers or market performance have set for a product or a process are known as customer specification restrictions, and they are typically based on input from the Voice of the Customer. In other words, it is the result that the metric that we use to measure should bring about.

Customers choose the upper and lower limits for product characteristics, which define the circumstances in which the product is useable. Assume that if the product exceeds these limits, the consumer will reject it. Specification restrictions are related to product design. As a result, during the product's design phase, impose these limitations.

a client's willingness to accept the specification's top bound.

The lowest specification restriction that a customer would accept.

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