Edge construction on optical devices
First Claim
Patent Images
1. A method of forming an optical device, comprising:
- forming a waveguide mask on a device precursor,the device precursor including a waveguide positioned on a base;
forming a facet mask on the device precursor such that at least a portion of the waveguide mask is between the facet mask and the base; and
forming a recess in the base while a protective portion of the facet mask is over a facet of the waveguide, the protective portion of the facet mask also being over a facet shelf that extends from a side of the recess.
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Abstract
A method of forming an optical device includes forming a waveguide mask on a device precursor. The device precursor includes a waveguide positioned on a base. The method also includes forming a facet mask on the device precursor such that at least a portion of the waveguide mask is between the facet mask and the base. The method also includes removing a portion of the base while the facet mask protects a facet of the waveguide.
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Citations
28 Claims
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1. A method of forming an optical device, comprising:
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forming a waveguide mask on a device precursor, the device precursor including a waveguide positioned on a base; forming a facet mask on the device precursor such that at least a portion of the waveguide mask is between the facet mask and the base; and forming a recess in the base while a protective portion of the facet mask is over a facet of the waveguide, the protective portion of the facet mask also being over a facet shelf that extends from a side of the recess. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of forming an optical device, comprising:
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forming a waveguide mask on a device precursor, the device precursor including a waveguide positioned on a base; forming a facet mask on the device precursor such that at least a portion of the waveguide mask is between the facet mask and the base; and removing a portion of the base while the facet mask protects a facet of the waveguide, the portion of the base being removed such that after removing the portion of the base the facet is above a facet shelf that extends outward from a plane that includes the facet with the waveguide and the facet shelf being on opposing sides of the facet, the facet shelf having a width less than 0.5 μ
m. - View Dependent Claims (18, 19, 20)
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21. A method of forming an optical device, comprising:
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forming a waveguide mask on a device precursor, the device precursor including a waveguide positioned on a base; forming a facet mask on the device precursor such that at least a portion of the waveguide mask is between the facet mask and the base; removing a portion of the base while the facet mask protects a facet of the waveguide, the portion of the base being removed such that after removing the portion of the base the facet is above a facet shelf that extends outward from a plane that includes the facet with the waveguide and the facet shelf being on opposing sides of the facet; and removing from the device precursor a protective portion of the facet mask, the protective portion of the facet mask being a portion of the facet mask that remains on the device precursor after the portion of the base is removed, the protective portion of the facet mask being removed such that a thickness of the facet shelf is reduced, the thickness of the facet shelf being measured in a direction that is perpendicular to a plane that includes the facet. - View Dependent Claims (22, 23, 24)
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25. A method of forming an optical device, comprising:
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forming a waveguide mask on a device precursor, the device precursor including a waveguide positioned on a base; forming a facet mask on the device precursor such that at least a portion of the waveguide mask is between the facet mask and the base; and removing a portion of the base while the facet mask protects a facet of the waveguide, the portion of the base being removed such that after removing the portion of the base a second portion of the base that remains on the device precursor undercuts the waveguide. - View Dependent Claims (26, 27, 28)
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Specification