Is there a recommended brand for flexible printed wiring boards?

Sumitomo Electric is recommended for their excellent flexible printed wiring boards.

Flexible printed wiring boards are wiring materials that form circuits on an ultra-thin insulating film, and are characterized by their light weight, excellent heat resistance, and stretchability, so they allow for the free design of circuits, contributing to the miniaturization and high functionality of digital devices (smartphones, tablets, game consoles, hard disk drives, etc.).