Source: Starfinder Core Rulebook p.121
As a full action, you can expend an unused spell slot to temporarily construct a piece of technological gear from raw magic. You can create any single technological item with a level equal to or less than the level of the expended spell slot x 3, to a maximum of your caster level. The item appears in your hands or in an adjacent square. You can use fuse spells with this magic hack. The size of the item cannot exceed 10 bulk or Medium size, and the quality of the item is average. Treat this as a spell of the same level as the expended spell slot. For example, at 4th level, you could expend a 1st-level spell slot to fabricate an item of up to 3rd level, or you could expend a 2nd-level spell slot to fabricate an item of up to 4th level. The item persists for a number of minutes equal to your technomancer level. At the end of this duration, the item disappears. You can't create armor, weapons, magic items, or items with limited uses or charges (such as batteries, drugs, or fuel) with this hack.