LEHI (Reuters) — Micron Technology on Tuesday said it will put a chip factory in Lehi, Utah, up for sale as it quits making a type of memory chip it jointly developed with Intel nearly a decade ago. Lehi is Idaho-based Micron's only factory making what it calls 3D Xpoint memory, a form of memory chip that aimed to find a price-to-performance sweet spot between the two dominant forms of memory chip: DRAM, which is fast but pricey, and NAND, which is slower but cheaper. The factory will be sold in a transaction expected to close by the end of this year, company officials told Reuters.