Active optical device
AssigneeZarlink Semiconductor Inc.
InventorJan Isaksson
Life of this patent
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Abstract
A method is disclosed for making an active optical device for coupling to optical fibers. Arrays of contacts are formed on the rear face of a substrate, which is preferably transparent, at precisely defined locations. Components are then flip-cup bonded onto the substrate using a solder alignment technique to attach the components to said substrate in precisely predetermined locations determined by the arrays of contacts. At least one of the components is a light emitter or receiver so that it can be optically coupled through the transparent substrate to an external light guide on the front face of the substrate. Preferably, a guide frame for positioning guide pins is bonded to the substrate also using a solder alignment technique.
Claims23
A method of making an active optical device for coupling to an external light guide, comprising the steps of:
- providing a substrate with a light path therethrough and having a front face and a rear face;
- providing a plurality of components for attachment to the rear face of said substrate, each said component having a face presenting an array of contacts, said components including at least one active optical component selected from the group consisting of a light emitter and light receiver;
- forming a plurality of arrays of contacts on the rear face of said transparent substrate at precisely defined locations corresponding to an intended location of the contacts of each component;
- flip-chip bonding said components onto said substrate using a solder alignment technique to attach said components to said substrate in precisely predetermined locations determined by said arrays of contacts;
- and
- said at least one optical component being oriented so that it can be optically coupled through said substrate to the external light guide.
A method as claimed in claim) 8, wherein said components further include a fan-out substrate having contacts for establishing electrical connection with the device
A method of making an active optical device for coupling to optical fibers, comprising the steps of:
- providing a transparent substrate having a front face and a rear face;
- providing a plurality of active components for attachment to the rear face of said substrate, each said active component having face presenting an array of contacts, said components including at least one optical component selected from the group consisting of a light emitter and light receiver;
- forming a plurality of arrays of solder bumps on the rear face of said transparent substrate at precisely defined locations corresponding to an intended location of the contacts of each component;
- forming at least one array of solder pads on the rear face of said substrate at precise locations for locating a guide frame;
- flip-chip bonding said components onto the rear face of said substrate using a solder alignment technique to attach said components to said substrate in precisely predetermined locations determined by said arrays of solder bumps;
- said at least one optical component being oriented so that it can be optically coupled through said transparent substrate to an external light guide on the front face thereof;
- and
- bonding said guide frame to said substrate using a solder alignment technique to locate said guide frame in a precise position, said guide frame including indicia marking the location of guide pills for said external light guide.
An active optical device comprising:
- a substrate providing a light path therethrough and having a front face and a rear face,
- a plurality of components solder bonded to the rear face, said components including at least one active optical component located so that it can be coupled through the substrate to an external light guide;
- a guide frame solder bonded to the rear face of the substrate;
- and
- a heat sink having guide pins bonded on the rear side of said substrate, said guide pins protruding forward to engage recesses in an external light guide coupling.
Dependencies are inferred from the claim text.