Methods for producing a conversion element and an optoelectronic component

US10727379B2 · kind B2 · utility

Assignee

• OSRAM Opto Semiconductors GmbH · DE

Inventors

• Alan Piquette · Kensington, US
• Adam Scotch · Amesbury, US
• Maxim N. Tchoul · Winchester, US
• Gertrud Kraeuter · Regensburg, DE

Key dates

• Filing date: Feb 16, 2018
• Grant date: Jul 28, 2020
• Expiry date: Aug 10, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/882

Abstract

The invention relates to a method for producing a conversion element for an optoelectronic component comprising the steps of: A) Producing a first layer, for that purpose: A1) Providing a polysiloxane precursor material, which is liquid, A2) Mixing a phosphor to the polysiloxane precursor material, wherein the phosphor is suitable for conversion of radiation, A3) Curing the arrangement produced under step A2) to produce a first layer having a phosphor mixed in a cured polysiloxane material, which comprises a three-dimensional crosslinking network based primarily on T-units, where the ratio of T-units to all units is greater than 80%, B) Producing a phosphor-free second layer, for that purpose: B1) Providing the polysiloxane precursor material, which is liquid, B2) Mixing a filler to the polysiloxane precursor material, wherein the filler is in a cured and powdered form, wherein the filler has a refractive index, which is equal to the refractive index of the cured polysiloxane material, B3) Curing the arrangement produced under step B2) to produce a second layer having a filler mixed in the cured polysiloxane material, which comprises a three-dimensional crosslinking network based p…