Top contact vcsel with monitor
CA 2287134 A1 · Owner: Wickstrom, Mikael · Inventors: Jonsson, Jan; Wickstrom, Mikael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vertical cavity surface emitting laser (VCSEL) and monitoring diode combination having reduced parasitic capacitance for use in high bandwidth communications systems. The VCSEL has both p-type and n-type contacts on the same, face. This allows the VCSEL to be mounted on a monitor chip or diode without using a, metal contact layer. In an embodiment wherein the VCSEL is soldered to the monitor, chip for mechanical stability only a small metal pad no larger than the VCSEL is used. The reduction in metallisation results in a lower parasitic capacitance that io turn results, in higher potential operational speeds,
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 19, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.