Optical transmitter package assembly including lead frame having exposed flange with key
First Claim
Patent Images
1. A package assembly comprising:
- a leadframe comprising a flag and at least three leads, wherein a first lead of said at least three leads is integral with said flag and said flag further includes a locating flange disposed around a periphery of said flag and having at least one key formed in said locating flange;
an optical transmitter mounted to said flag at a height and lateral alignment determined in response to said locating flange and said at least one key;
a package enclosing said optical transmitter and a portion of said leadframe so that said locating flange and said at least one key are disposed outside of said package; and
an optical element mounted to said package above said optical transmitter and optically coupled to said optical transmitter.
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Abstract
A package assembly (31) has a leadframe (10) including a locating flange (30), an optical transmitter (22) such as a laser diode mounted to the leadframe, and a package (32) enclosing both the optical transmitter and a portion of the leadframe so that the locating flange of the leadframe is disposed outside of the package. The locating flange is used as a reference datum to align the optical transmitter'"'"'s relative height and lateral position during manufacture. Also, the locating flange is used as a reference datum in mating the package assembly to other, standard optical components when mounting to other components in an optical end product.
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Citations
10 Claims
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1. A package assembly comprising:
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a leadframe comprising a flag and at least three leads, wherein a first lead of said at least three leads is integral with said flag and said flag further includes a locating flange disposed around a periphery of said flag and having at least one key formed in said locating flange; an optical transmitter mounted to said flag at a height and lateral alignment determined in response to said locating flange and said at least one key; a package enclosing said optical transmitter and a portion of said leadframe so that said locating flange and said at least one key are disposed outside of said package; and an optical element mounted to said package above said optical transmitter and optically coupled to said optical transmitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification