The paper presents the design and characterization of a packaged flip-chip superconducting quantum processor with low signal crosstalk, crucial for maintaining high performance in large-scale quantum computing. The processor consists of 25 qubits and is designed with a repeating signal-line routing pattern to support scalability. The authors report on-resonant crosstalk for capacitively coupled qubit-drive lines (xy-lines) of better than −27 dB (average −37 dB) and direct-current flux crosstalk for inductively coupled magnetic-flux-drive lines (z-lines) of less than 0.13% (average 0.05%). These levels are promising for further scaling up to larger numbers of qubits. The study discusses the implications of these results for the design of low-crosstalk, on-chip signal delivery architectures, including the use of shielding tunnel structures and the influence of qubit separation on crosstalk levels. The results show a decreasing trend in crosstalk with increasing qubit separation, which is favorable for scaling. The paper also provides numerical estimates for the single-qubit gate error due to crosstalk in various scenarios and discusses the impact of crosstalk on gate fidelities.The paper presents the design and characterization of a packaged flip-chip superconducting quantum processor with low signal crosstalk, crucial for maintaining high performance in large-scale quantum computing. The processor consists of 25 qubits and is designed with a repeating signal-line routing pattern to support scalability. The authors report on-resonant crosstalk for capacitively coupled qubit-drive lines (xy-lines) of better than −27 dB (average −37 dB) and direct-current flux crosstalk for inductively coupled magnetic-flux-drive lines (z-lines) of less than 0.13% (average 0.05%). These levels are promising for further scaling up to larger numbers of qubits. The study discusses the implications of these results for the design of low-crosstalk, on-chip signal delivery architectures, including the use of shielding tunnel structures and the influence of qubit separation on crosstalk levels. The results show a decreasing trend in crosstalk with increasing qubit separation, which is favorable for scaling. The paper also provides numerical estimates for the single-qubit gate error due to crosstalk in various scenarios and discusses the impact of crosstalk on gate fidelities.