检测项目

高温工作寿命测试：将样品置于高于额定工作温度的恒温环境中持续通电运行，监测其电学参数随时间的变化趋势，评估长期高温下的性能退化与失效机理。

低温启动与运行测试：考察产品在低温环境下的启动能力与正常工作状态，记录启动时间、工作电流及输出电压等参数，判断其在寒冷地区的适用性。

温度循环测试：使样品在设定的高温和低温极值之间进行多次循环转换，检验因材料热膨胀系数不匹配导致的机械应力、开裂或连接失效。

热冲击测试：采用快速温变方式使样品承受急剧的温度变化，评估其对抗热应力骤变的能力，常用于检验封装材料与结构的完整性。

高低温存储测试：将样品在不通电状态下置于高温和低温环境中储存规定时间，恢复常温后检测其性能是否不可逆劣化。

温度湿度偏压测试：在高温高湿环境下对器件施加偏置电压，加速评估金属化腐蚀、离子迁移等电化学失效模式。

尺寸稳定性。

熔点与软化点测试

热稳定性。

导热系数测定

检测范围

热变形温度、低温脆化特性以及反复冷热交替后的力学性能保持率。

Temperature Stability Testing

Article Introduction:

The following sections detail the key aspects of temperature stability testing, including test items, scope of application, relevant standards, and essential instrumentation.

Test Items:

• * **High-Temperature Operating Life (HTOL) Test:** Subjects the sample to elevated temperatures above its rated operating limit while under electrical bias for an extended period. Monitors parametric shifts and failure mechanisms to assess long-term reliability under thermal stress.

• * **Low-Temperature Startup and Operation Test:** Evaluates the device's ability to start up and function correctly at specified low temperatures. Parameters like startup time, operating current, and output voltage are recorded.

• * **Temperature Cycling Test:** Exposes the sample to repeated cycles of alternating high and low temperature extremes. This test identifies failures caused by coefficient of thermal expansion (CTE) mismatches, such as solder joint fatigue, cracking, or delamination.

• * **Thermal Shock Test:** Involves rapidly transferring the sample between extreme hot and cold chambers. Assesses resistance to catastrophic failure due to rapid thermal expansion and contraction stresses.

• * **High/Low Temperature Storage Test:** Stores the non-operational sample at high and low temperature extremes for defined durations. Post-storage evaluation checks for permanent degradation upon return to ambient conditions.

• * **Temperature Humidity Bias (THB) Test:** Combines high temperature and high humidity with electrical bias to accelerate failure modes like corrosion, electrolysis, and ionic migration.

  检测流程

  线上咨询或者拨打咨询电话;

  获取样品信息和检测项目;

  支付检测费用并签署委托书;

  开展实验，获取相关数据资料;

  出具检测报告。