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Scrape Test

Scratch Test

The irregular removal of a deposited layer from a base material by a shearing action from another surface such that the base material is exposed over an extended area. It can also apply to the removal of surface layers from a material. The material removed from the scraped area may build up at the edges of the scrape. ERAI Note: Scrape tests are commonly used to determine if a part has been blacktopped; however, industry consensus is that scrape tests are not accurate measures to determine a part’s authenticity and should not be used as a stand-alone inspection criteria.
Source: Semiconductor Equipment and Materials International, SEMI® International Standards: Compilation of Terms (Updated 1108).