Process for producing a layer composite consisting of a luminescence conversion layer and a scattering layer

US8748201B2 · kind B2 · utility

Assignee

• OSRAM Opto Semiconductors GmbH · DE

Inventors

• Stephan Preuss · Bad Abbach, DE
• Thomas Bemmerl · Schwandorf, DE

Key dates

• Filing date: Jul 20, 2011
• Grant date: Jun 10, 2014
• Expiry date: Jul 28, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/882
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process of producing a layer composite includes a luminescence conversion layer and a scattering layer, wherein a press having a first pressing tool with a cavity and a second pressing tool is used including introducing a first polymer including a luminescence conversion substance into the cavity, inserting a film between the first and second tools, closing the press and carrying out a first pressing, hardening the first polymer to form a luminescence conversion layer in the press, opening the press, wherein the luminescence conversion layer adhering to the film remains in the press, introducing a second polymer including scattering particles into the cavity, closing the press and carrying out a second pressing, hardening the second polymer to form a scattering layer disposed on the luminescence conversion layer, opening the press, and removing the support film with the layer composite including the luminescence conversion layer and the scattering layer.