Which statement about clamshell testing land area is true?

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Multiple Choice

Which statement about clamshell testing land area is true?

Clamshell testing land area is about having a defined pad size so the test fixture can grip and contact the pad consistently, giving repeatable results. The standard specifies a land area of about 0.9 mm, which is 36 mils. This size provides enough contact surface for reliable clamping without encroaching on nearby features or causing interference with solder mask or neighboring pads. If the land area were much smaller, the contact would be unstable and results could vary; there is a specified value, so a default of “not specified” isn’t correct; and making it as large as 1.2 mm or more would unnecessarily enlarge the pad, potentially affecting adjacent features and the test outcome.

Clamshell testing land area is about having a defined pad size so the test fixture can grip and contact the pad consistently, giving repeatable results. The standard specifies a land area of about 0.9 mm, which is 36 mils. This size provides enough contact surface for reliable clamping without encroaching on nearby features or causing interference with solder mask or neighboring pads. If the land area were much smaller, the contact would be unstable and results could vary; there is a specified value, so a default of “not specified” isn’t correct; and making it as large as 1.2 mm or more would unnecessarily enlarge the pad, potentially affecting adjacent features and the test outcome.

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