Abstract: A substrate is provided. The substrate includes a bottom plate and at least one bonding portion disposed on the bottom plate, where each bonding portion takes a shape that is a part of an Archimedean spiral. An electronic device, a bonding structure, and a bonding method for the bonding structure are further provided.

Abstract: A foldable display device and a foldable terminal are provided. The foldable display device comprises a flexible screen, a folding mechanism, a bendable flattening sheet, and two sets of sliding mechanisms. The folding mechanism, the flattening sheet and the flexible screen are laminated in sequence, and are fixedly connected to each other at a middle folding position, so as to avoid arching of the flexible screen. The two sets of sliding mechanisms each include a first spring, a first sliding member, a second spring, and a second sliding member connected in sequence; two ends of the flattening sheet are fixed to the first sliding members of the two sets of sliding mechanisms respectively, and two ends of the flexible screen are fixed to the second sliding members of the two sets of sliding mechanisms respectively.

Abstract: A substrate is provided. The substrate includes a bottom plate and at least one bonding portion disposed on the bottom plate, where each bonding portion takes a shape that is a part of an Archimedean spiral. An electronic device, a bonding structure, and a bonding method for the bonding structure are further provided.