Multi-fiber optical connector ferrule and optical module
[Problem] To provide a multi-fiber optical connector ferrule that has low connection loss even when optical wiring is mounted on a substrate. [Solution] This multi-fiber optical connector ferrule: is obtained by molding a resin composition that includes polyphenylene sulfide; and has optical fiber insertion holes 103 and a guide hole 102 for guide pin insertion. The dimensional variation of the multi-fiber optical connector ferrule when heated at 260° C. is no more than 0.1%. The multi-fiber optical connector ferrule is a high-density optical connector having at least eight optical fiber insertion holes provided therein. The optical fiber insertion holes have an internal diameter of 127 μm and are provided at a pitch of no more than 250 μm.
1 . A multicore optical connector ferrule that is a molded article made of a resin composition containing polyphenylene sulfide as a main component of a base resin of the resin composition, the ferrule comprising:
optical fiber insertion holes; and guide holes for guide pin insertion,
wherein a dimensional variation ratio of the multicore optical connector ferrule in case heated at 260° C. is no more than 0.1%.
2 . The multicore optical connector ferrule according to claim 1 , further comprising:
a boot insertion hole allowing a boot to be inserted from a rear end face side opposite to a connection end face of the ferrule,
wherein the boot insertion hole includes a thermal expansion absorbing portion that absorbs thermal expansion of an internal member of the ferrule.
3 . The multicore optical connector ferrule according to claim 2 , wherein the thermal expansion absorbing portion has a width-direction length at least 0.5 times and no more than 0.9 times a width-direction length of the boot insertion hole.
4 . The multicore optical connector ferrule according to claim 1 ,
wherein the multicore optical connector ferrule is a high-density optical connector having at least eight of the optical fiber insertion holes provided therein, and
the optical fiber insertion holes have an internal diameter of no more than 127 μm, and are provided at a pitch of no more than 250 μm.
5 . The multicore optical connector ferrule according to claim 1 , wherein the ferrule is connected to a photoelectric conversion element provided on a substrate.
6 . The multicore optical connector ferrule according to claim 1 , wherein the resin composition contains the polyphenylene sulfide in an amount of 50 wt % or more of the base resin of the resin composition.
7 . The multicore optical connector ferrule according to claim 1 , wherein the resin composition contains 20 wt % or more and 40 wt % or less of the polyphenylene sulfide with respect to the resin composition.
8 . The multicore optical connector ferrule according to claim 7 , wherein the resin composition further contains 60 wt % or more and 80 wt % or less of an inorganic filler with respect to the resin composition.
9 . An optical module, comprising: a multicore optical connector that includes a multicore optical connector ferrule; and a substrate on which the multicore optical connector is mounted by solder reflow,
wherein the ferrule has optical fiber insertion holes and guide holes for guide pin insertion,
the ferrule is made by heat-treating a molded article made of a resin composition containing polyphenylene sulfide as a main component of a base resin of the resin composition, at a temperature T 3 , and
the temperature T 3 at which the heat-treating is performed is below a glass transition temperature T 1 of the polyphenylene sulfide, and above a temperature T 2 for the solder reflow.
10 . The optical module according to claim 9 , wherein the ferrule heated at the temperature T 2 for the solder reflow has a dimensional variation ratio no more than 0.18 in case heated at 260° C.
11 . The optical module according to claim 9 , further comprising:
a boot insertion hole allowing a boot to be inserted from a rear end face side opposite to a connection end face of the ferrule,
wherein the boot insertion hole includes a thermal expansion absorbing portion that absorbs thermal expansion of an internal member of the ferrule.
12 . The optical module according to claim 9 , wherein the temperature T 2 for the solder reflow is 20° C. to 50° C. below the glass transition temperature T 1 of the polyphenylene sulfide, and the temperature T 3 at which the molded article is heat-treated is 5° C. to 20° C. above the temperature T 2 for the solder reflow.
13 . The optical module according to claim 12 , wherein the glass transition temperature T 1 of the polyphenylene sulfide is between 290° C. and 310° C., the temperature T 2 for the solder reflow is between 250° C. and 270° C., and the temperature T 3 of the heat treatment is between 265° C. and 290° C.
14 . The optical module according to claim 9 , wherein the resin composition contains the polyphenylene sulfide in an amount of 50 wt % or more of the base resin of the resin composition.
15 . An optical module, comprising: a multicore optical connector that includes a multicore optical connector ferrule; and a substrate on which the multicore optical connector is mounted by solder reflow,
wherein the ferrule is a molded article that is made of a resin composition containing polyphenylene sulfide as a main component of a base resin of the resin composition, and has optical fiber insertion holes, and guide holes for guide pin insertion, and
a dimensional variation ratio of the ferrule in case heated at 260° C. is no more than 0.1%.
16 . The optical module according to claim 15 , wherein the resin composition contains the polyphenylene sulfide in an amount of 50 wt % or more of the base resin of the resin composition.