选择粘结电线材料
金线、铜线、银线和铝线在导电性、硬度、氧化性能、成本和加工要求方面存在差异。直径、涂层、垫面处理以及封装环境也影响到选择。.
了解更多 →金线、铜线、银线和铝线在导电性、硬度、氧化性能、成本和加工要求方面存在差异。直径、涂层、垫面处理以及封装环境也影响到选择。.
了解更多 →球形连接方式速度快,通常使用金线或铜线,而楔形连接则支持铝线、低环形设计和定向几何形状。产品设计和材料决定了最佳方法。.
了解更多 →桥接、润湿不足、焊点球、墓石现象、空隙以及枕头内头缺陷往往源于设计、材料、印刷、放置和热因素之间的相互作用。.
了解更多 →流向型工艺应能够激活流化剂,限制热冲击,实现完全的润湿,并避免过度的金属间结晶生长。预热、浸泡、在液相以上的时间、峰值温度以及冷却速率都至关重要。.
了解更多 →SAC 合金的应用范围很广,而低银、含铋的锡铜合金以及特种合金则针对成本或温度要求而设计。在选择时应考虑可靠性、熔化范围、与表面处理的兼容性以及返工问题。.
了解更多 →通过兼容的表面处理、控制的粘贴打印、稳定的重新粘合、合适的接缝几何结构、清洁度以及来自检测和可靠性数据的反馈,生产可靠性得以提升。.
了解更多 →Thermal cycling accelerates fatigue caused by repeated expansion and contraction. Test range, dwell time, ramp rate, sample design, monitoring, and failure criteria must represent the application.
了解更多 →Cracks may result from thermal-expansion mismatch, brittle intermetallic layers, voiding, vibration, board flexure, or handling. Fracture location and morphology help identify the dominant cause.
了解更多 →Service life improves when touchdown force, overdrive, cleaning frequency, storage, handling, and transport are controlled. Maintenance decisions should be based on condition and performance trends.
了解更多 →Alignment and planarity determine whether probes contact the intended pad locations with balanced force. Optical inspection, scrub-mark review, and metrology help identify bent, worn, or shifted probes.
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