1.0mm Board-to-Board Connectors, DF9 Series The Hirose DF9 Series 1.0mm Board-to-Board Connectors (31 and 41 contact connectors) are compliant with the VESA (Video Electronics Standards Association) FPDI-1 (flat panel interface) standard. The mating area is designed to perfectly prevent mis-insertion, despite the miniature size, and provides smooth insertion and extraction. The SMT DF9 1.0mm Board-to-Board Connectors are equipped with an easy lock mechanism to assure a firm insertion. The Hirose DF9 Connectors are ideal for LCD, mobile phones, and notebook PCs.