Responding to the buzz around bent 2018 iPad Pros, Apple published a support page that details the device’s manufacturing process.
Apple says that the design of the new iPad Pro models incorporates a precision aluminum unibody enclosure that is "strong, light, and durable." Instead of the curved edges found on previous-generation iPad models, these new iPad Pro models feature a rectangular design with straight edges.
iPad Pro cellular models now feature Gigabit-class LTE. To provide optimal cellular performance, small vertical bands or “splits” in the sides of the iPad allow parts of the enclosure to function as cellular antennas. For the first time on an iPad, these bands are manufactured using a process called co-molding. In this high-temperature process, plastic is injected into precisely milled channels in the aluminum enclosure where it bonds to micro-pores in the aluminum surface. After the plastic cools, the entire enclosure is finished with a precision CNC machining operation, yielding a seamless integration of plastic and aluminum into a single enclosure.
"These precision manufacturing techniques and a rigorous inspection process ensure that these new iPad Pro models meet an even tighter specification for flatness than previous generations. This flatness specification allows for no more than 400 microns of deviation across the length of any side — less than the thickness of four sheets of paper. The new straight edges and the presence of the antenna splits may make subtle deviations in flatness more visible only from certain viewing angles that are imperceptible during normal use. These small variances do not affect the strength of the enclosure or the function of the product and will not change over time through normal use," Apple says.
Apple urges anyone who believes their iPad Pro enclosure has a warp or bend beyond 400 microns to contact the company’s support channels, and also reminds customers of its 14-day return policy.