an exemplary mounting support for a flexible printed circuit board is provided . the flexible printed circuit board has a side surface and at least one electronic component mounted on the side surface . the mounting support includes a first surface for contacting with the side surface of the flexible printed circuit board and a second surface on an opposite side of the mounting support to the first surface . the mounting support has at least one first recess defined in the first surface for receiving the at least one electronic component therein and at least one through - hole defined through the first surface and the second surface . the mounting support has at least one second recess defined in the second surface . the mounting support can fix a double surface mounted flexible printed circuit board flatly , thereby enhancing laser processing precision .