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US 12,586,981 B2Granted
Semiconductor laser device
AssigneeRohm Co., Ltd.
InventorsAtsushi Yamaguchi, Koki Sakamoto
Life of this patent
Estimating the term…
Abstract
This semiconductor laser device comprises: a semiconductor laser element; a switching element connected in series to the semiconductor laser element, the switching element having a gate electrode, a drain electrode, and a source electrode; capacitors connected in parallel to the semiconductor laser element and the switching element; first drive electroconductive parts to which first terminals of the capacitors are connected; a second drive electroconductive part positioned apart from the first drive electroconductive parts; first drive connection members that connect the first drive electroconductive parts and the source electrode; and a second drive connection member that connects the second drive electroconductive part and the source electrode.
Claims19
A semiconductor laser device, comprising:
- a semiconductor laser element:
- a switching element connected in series to the semiconductor laser element, the switching element including:
- a control electrode,
- a first drive electrode, and
- a second drive electrode,
- the switching element controlling a current flowing to the semiconductor laser element in accordance with a voltage applied to the control electrode;
- a capacitor configured to be connected in parallel to the semiconductor laser element and the switching element;
- a first drive conductor connected to a first terminal of the capacitor;
- a second drive conductor located separate from the first drive conductor;
- a first drive connection member connecting the first drive conductor and the second drive electrode;
- and
- a second drive connection member connecting the second drive conductor and the second drive electrode;
- a terminal conductor configured to be a terminal of the semiconductor laser device, wherein
- the terminal conductor includes:
- a first terminal conductor configured to be connected to a negative electrode of a power supply, the power supply being configured to supply power to the semiconductor laser device, and
- a second terminal conductor configured to be connected to an input electrode of a driver circuit, the driver circuit being configured to apply a voltage to the control electrode of the switching element,
- the first drive conductor is electrically connected to the first terminal conductor, and
- the second drive conductor is electrically connected to the second terminal conductor.
15 more elements
A semiconductor laser device, comprising:
- a semiconductor laser element;
- a switching element connected in series to the semiconductor laser element, the switching element including:
- a control electrode,
- a first drive electrode, and
- a second drive electrode,
- the switching element controlling a current flowing to the semiconductor laser element in accordance with a voltage applied to the control electrode;
- a capacitor configured to be connected in parallel to the semiconductor laser element and the switching element;
- a first drive conductor connected to a first terminal of the capacitor;
- a second drive conductor located separate from the first drive conductor;
- a first drive connection member connecting the first drive conductor and the second drive electrode;
- and
- a second drive connection member connecting the second drive conductor and the second drive electrode;
- wherein
- the semiconductor laser element, the switching element, and the second drive conductor are arranged in order in a predetermined first direction in a plan view of the semiconductor laser device, and
- the first drive conductor and the switching element are arranged in order in a second direction that is orthogonal to the first direction in the plan view.
12 more elements
A semiconductor laser device, comprising:
- a semiconductor laser element;
- a switching element connected in series to the semiconductor laser element, the switching element including:
- a control electrode,
- a first drive electrode, and
- a second drive electrode,
- the switching element controlling a current flowing to the semiconductor laser element in accordance with a voltage applied to the control electrode;
- a capacitor configured to be connected in parallel to the semiconductor laser element and the switching element;
- a first drive conductor connected to a first terminal of the capacitor;
- a second drive conductor located separate from the first drive conductor;
- a first drive connection member connecting the first drive conductor and the second drive electrode;
- and
- a second drive connection member connecting the second drive conductor and the second drive electrode;
- wherein
- the semiconductor laser element includes semiconductor light emitting layers arranged in order in the second direction, and
- the semiconductor light emitting layers are connected to each other by a single electrode.
12 more elements
A semiconductor laser device, comprising:
- a semiconductor laser element;
- a switching element connected in series to the semiconductor laser element, the switching element including:
- a control electrode,
- a first drive electrode, and
- a second drive electrode,
- the switching element controlling a current flowing to the semiconductor laser element in accordance with a voltage applied to the control electrode;
- a capacitor configured to be connected in parallel to the semiconductor laser element and the switching element;
- a first drive conductor connected to a first terminal of the capacitor;
- a second drive conductor located separate from the first drive conductor;
- a first drive connection member connecting the first drive conductor and the second drive electrode;
- a second drive connection member connecting the second drive conductor and the second drive electrode;
- and
- a third drive conductor connected to the first drive electrode of the switching element, wherein the semiconductor laser element is connected to the third drive conductor.
10 more elements
A semiconductor laser device, comprising:
- a semiconductor laser element;
- a switching element connected in series to the semiconductor laser element, the switching element including:
- a control electrode,
- a first drive electrode, and
- a second drive electrode,
- the switching element controlling a current flowing to the semiconductor laser element in accordance with a voltage applied to the control electrode;
- a capacitor configured to be connected in parallel to the semiconductor laser element and the switching element;
- a first drive conductor connected to a first terminal of the capacitor;
- a second drive conductor located separate from the first drive conductor;
- a first drive connection member connecting the first drive conductor and the second drive electrode;
- a second drive connection member connecting the second drive conductor and the second drive electrode;
- and
- a fourth drive conductor connected to a second terminal of the capacitor, wherein
- the semiconductor laser element, the switching element, and the second drive conductor are arranged in order in a predetermined first direction in a plan view of the semiconductor laser device, and
- the fourth drive conductor and the first drive conductor are arranged in order in the first direction.
12 more elements
A semiconductor laser device, comprising:
- a semiconductor laser element;
- a switching element connected in series to the semiconductor laser element, the switching element including:
- a control electrode,
- a first drive electrode, and
- a second drive electrode,
- the switching element controlling a current flowing to the semiconductor laser element in accordance with a voltage applied to the control electrode;
- a capacitor configured to be connected in parallel to the semiconductor laser element and the switching element;
- a first drive conductor connected to a first terminal of the capacitor;
- a second drive conductor located separate from the first drive conductor;
- a first drive connection member connecting the first drive conductor and the second drive electrode;
- a second drive connection member connecting the second drive conductor and the second drive electrode;
- a control conductor located separate from the first drive conductor and the second drive conductor and configured to be electrically connected to the control electrode;
- and
- a control connection member configured to connect the control electrode and the control conductor,
- wherein the control connection member and the second drive connection member are located adjacent to each other.
12 more elements
A semiconductor laser device, comprising:
- a semiconductor laser element;
- a switching element connected in series to the semiconductor laser element, the switching element including:
- a control electrode,
- a first drive electrode, and
- a second drive electrode,
- the switching element controlling a current flowing to the semiconductor laser element in accordance with a voltage applied to the control electrode;
- a capacitor configured to be connected in parallel to the semiconductor laser element and the switching element;
- a first drive conductor connected to a first terminal of the capacitor;
- a second drive conductor located separate from the first drive conductor;
- a first drive connection member connecting the first drive conductor and the second drive electrode;
- a second drive connection member connecting the second drive conductor and the second drive electrode;
- and
- a support substrate including a substrate main surface and a substrate back surface that face in opposite directions in a direction perpendicular to the substrate main surface, wherein
- at least the first drive conductor is formed on the substrate main surface, and
- a terminal conductor configured to be a terminal of the semiconductor laser device is formed on the substrate back surface.
12 more elements
Dependencies are inferred from the claim text.