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__________ is a PVD technique in which the bulk material is released into the vacuum by bombardment from an ion source.

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__________ is a PVD technique in which the bulk material is released into the vacuum by bombardment from an ion source.

(a) Splattering

(b) Sputtering

(c) Splashing

(d) Spreading

I have been asked this question in semester exam.

This intriguing question originated from Blending and Vapor Deposition in Thermoplastics topic in chapter Thermoplastic Polymers Properties & Processing of Food Packaging Technology

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The correct choice is (b) Sputtering

Explanation: Sputtering is a PVD technique in which the bulk material is released into the vacuum by bombardment from an ion source. The material coalesces onto the substrate surface, thus forming a thin film.

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