Patent ID: 6913488

Claim:
A receptacle connector mounted on a circuit board, said receptacle connector comprising an insulator and a plurality of contact pins held by the insulator, wherein the insulator comprises a base portion elongated in a first direction (X) and having a thickness in a second direction (Y) perpendicular to the first direction (X) and a height in a third direction (Z) perpendicular to the first and second directions, (X, Y), the insulator further comprises a plate like portion, the plate like portion extending in the second direction (Y) from a top end of the base portion in the third direction (Z) and having lower and upper surfaces opposite to each other in the third direction (Z), the plate like portion having a plurality of grooves formed in the lower surface, the grooves extending in parallel with each other in the second direction (Y) and being spaced from each other in the first direction (X) so that a plurality of ridges are formed between the respective neighboring ones of the grooves in the first direction (X), and wherein the contact pins are supported by the base portion and extend in the second direction (Y) along the grooves, respectively, characterized in that the insulator is provided with a pattern on the upper surface, the pattern comprises a plurality of depressed portions formed on the upper surface and/or a plurality of raised portions formed on the upper surface, wherein the insulator is made of anisotropic resin, wherein each of the depressed portions extends in the second direction (Y) and having an extent longer in the second direction (Y) than in the first direction (X), and wherein each of the raised portions extends in the second direction (Y) and has an extent longer in the second direction (Y) than in the first direction (X), wherein each of the depressed portions is positioned in correspondence with any one of the ridges, or wherein each of the raised portions is positioned in correspondence with any one of the grooves, or both.