Component Library & Layout Viewer
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This page describes how to explore the catalog of pre-designed quantum hardware components and inspect the final physical layout.

Component Library
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The **Component Library** is a catalog of standard superconducting components.

1. Go to the **Component Library** screen.
2. Search and filter components by category:
   * **Qubits**: Dolan junctions, Manhattan junctions, SQUID loops, SNAILs, Transmon Crosses, and Transmon Pockets.
   * **Feedlines**: Microwave pathways for reading multiple qubits.
   * **Resonators**: Standard Route Meanders and Rectangular Resonator Coils.
   * **Couplers**: Direct or bus couplers linking qubits.
   * **Routes**: Automated transmission line pathways.
   * **Launchpads**: Signal launches for external cabling.
3. Click on a component card to view its description, pin configuration, parameter fields (such as default dimensions), and GDS layer mapping.

*What this means:* The library serves as an encyclopedia of all standard hardware primitives that are compatible with the schematic editor and Qiskit Metal.

Layout Viewer
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The **Layout Viewer** allows you to inspect the physical GDS layout file that will be sent to the fabrication facility.

1. Navigate to the **Layout Viewer** page.
2. The screen displays a high-resolution, multi-layer rendering of the chip.
3. Use the control panel to inspect individual mask layers:
   * **Layer 1 (Metalization)**: Ground planes, transmission lines, and qubit capacitor pads.
   * **Layer 2 (Josephson Junctions)**: The superconducting junctions.
   * **Layer 3 (Dielectric Vias)**: Contact holes and insulation windows.
4. Pan, zoom, and measure features on the chip canvas to verify spacing.

*What you just did:* You inspected the raw geometrical definitions of the chip (which dictates how the physical layout will be patterned onto the silicon wafer).