Optical integrated device manufacturing process and device manufactured by the process thereof
First Claim
1. A process for manufacturing an integrated optical device comprising the steps of:
- depositing on a support substrate a multilayer comprising first and second cladding layer in order to hold in a multilayer first region a core layer of a waveguide of the optical device, said core being provided with an electromagnetic radiation inlet/outlet port;
forming a regulation layer at least in said multilayer first region having associated a first etching speed which is distinguished from respective etching speeds of said first and second cladding layers;
etching a multilayer second region adjacent said first region, thus obtaining a cavity having a first wall which inclined relative to the substrate such as to at least partially extend in said first region and turning out to be near said inlet/outlet port, said etching resulting in a removal of portions of the regulation layer and the cladding layers at different speeds, in order to cause the formation of said first inclined wall; and
positioning said regulation layer between said core and said substrate.
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Abstract
The invention relates to a process for manufacturing an integrated optical device comprising the deposition on a support substrate of a multilayer being formed by first and second cladding layers in order to hold in a multilayer first region a waveguide core layer. The core is provided with an electromagnetic radiation (L) inlet/outlet port. Furthermore, the process provides for the formation of a regulation layer having a first etching speed associated therewith, which is distinguished from the etching speeds of the cladding layers. Subsequently to an etching of a multilayer second region, a cavity is obtained having a first wall which is inclined relative to the substrate at least partially extending in said first region and which is near said inlet/outlet port. Such etching removes portions of the regulation layer and the cladding layers at different speeds in order to result in the formation of the inclined wall.
16 Citations
24 Claims
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1. A process for manufacturing an integrated optical device comprising the steps of:
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depositing on a support substrate a multilayer comprising first and second cladding layer in order to hold in a multilayer first region a core layer of a waveguide of the optical device, said core being provided with an electromagnetic radiation inlet/outlet port; forming a regulation layer at least in said multilayer first region having associated a first etching speed which is distinguished from respective etching speeds of said first and second cladding layers; etching a multilayer second region adjacent said first region, thus obtaining a cavity having a first wall which inclined relative to the substrate such as to at least partially extend in said first region and turning out to be near said inlet/outlet port, said etching resulting in a removal of portions of the regulation layer and the cladding layers at different speeds, in order to cause the formation of said first inclined wall; and positioning said regulation layer between said core and said substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11)
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8. A process for manufacturing an integrated optical device comprising the steps of:
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depositing on a support substrate a multilayer comprising first and second cladding layer in order to hold in a multilayer first region a core layer of a waveguide of the optical device, said core being provided with an electromagnetic radiation inlet/outlet port; forming a regulation layer at least in said multilayer first region having associated a first etching speed which is distinguished from respective etching speeds of said first and second cladding layers; and etching a multilayer second region adjacent said first region, thus obtaining a cavity having a first wall which inclined relative to the substrate such as to at least partially extend in said first region and turning out to be near said inlet/outlet port, said etching resulting in a removal of portions of the regulation layer and the cladding layers at different speeds, in order to cause the formation of said first inclined wall, said etching step further comprising performing an anisotropic etching through an opening of a multilayer protective mask in order to open said cavity in the multilayer provided with walls which are essentially orthogonal to the substrate; and performing a second wet etching in order to enlarge said cavity by creating said first and second inclined walls. - View Dependent Claims (9, 10)
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12. A process for manufacturing an integrated optical device comprising the steps of:
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depositing on a support substrate a multilayer comprising first and second cladding layer in order to hold in a multilayer first region a core layer of a waveguide of the optical device, said core being provided with an electromagnetic radiation inlet/outlet port; forming a regulation layer at least in said multilayer first region having associated a first etching speed which is distinguished from respective etching speeds of said first and second cladding layers; etching a multilayer second region adjacent said first region, thus obtaining a cavity having a first wall which inclined relative to the substrate such as to at least partially extend in said first region and turning out to be near said inlet/outlet port, said etching resulting in a removal of portions of the regulation layer and the cladding layers at different speeds, in order to cause the formation of said first inclined wall, wherein said deposition step of the multilayer comprises the further steps of; depositing the first cladding layer above said regulation layer, said first layer being non-doped silicon dioxide; depositing the core layer above said first cladding layer, said core layer being germanium-doped silicon dioxide; performing a photolithographic process of said core layer in order to obtain the layout of the waveguide core in said multilayer first region; covering said core by means of the second cladding layer, said second cladding layer being boron and phosphor-doped silicon dioxide. - View Dependent Claims (13, 14)
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15. An integrated optical device comprising:
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a multilayer deposited on a support substrate, the multilayer including first and second cladding layers in order to hold in a multilayer first region a core layer of a waveguide of the optical device, said core being provided with at least an electromagnetic radiation inlet/outlet port; a cavity obtained in a multilayer second region adjacent said first region, said cavity being provided with a first wall which is inclined relative to the substrate such as to at least partially extend in said first region and turning out to be near said inlet/outlet port; a regulation layer at least a portion of which is positioned in said multilayer first region sandwiched between the substrate and the first cladding layer, said regulation layer having associated a first etching speed distinguished from respective etching speeds of said first and second cladding layers. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification