Metal injection molding is a metalworking process that's used to create very small metal pieces that are typically used by Apple for the internals of products like iPhone and Apple Watch. Apple is looking to use the technology for its MacBook hinges to save space and achieve an "ultra-thin" design, according to DigiTimes.
The new hinges will be supplied by Amphenol, who claims to produce some of the thinnest sliding hinges in the world on its website. The company partners with Microsoft to produce the parts for the hinges on the Microsoft Surface 4.
While DigiTimes has a mixed track record reporting Apple's future plans, the report does corroborate an earlier report that Apple was working toward a slimmer MacBook, likely scheduled for release after WWDC 2016. However, it's unclear which MacBook lineup these reports are referring to. Apple's refreshed MacBook is expected to include faster Skylake processors and Thunderbolt 3 with USB-C.