薄膜应力与晶圆翘曲测量Thin-film stress and wafer curvature measurement

先定义镀膜前后的比较条件，再讨论应力数值与验收。Define comparable pre- and post-deposition conditions before specifying stress acceptance.

适合什么需求Suitable projects

适用于介质膜、金属膜或 MEMS 工艺试片的残余应力评估，以及镀膜、退火前后的翘曲变化比较。询价时请说明目标是平均膜应力、曲率分布还是整片形貌，三者的报告口径需要分别约定。For residual-stress assessment of dielectric, metal or MEMS pilot films and shape comparison before and after deposition or annealing. Specify whether the deliverable is average film stress, a curvature map or wafer shape; agree on each report separately.

曲率法能回答什么What curvature can tell you

曲率法依据膜层引起的基底弯曲估算平均应力；Stoney 关系涉及基底双轴模量、基底厚度、膜厚与曲率变化。薄膜近似和小变形等条件不满足时，直接套用会失准。[1] 空间不均匀膜层也需要检查模型适用性。[2]Curvature methods infer average stress from film-induced substrate bending. The Stoney relation uses substrate biaxial modulus, substrate thickness, film thickness and curvature change. Thin-film and small-deflection assumptions require checking. [1] Spatial nonuniformity also calls for model review. [2]

询价与送样资料Quotation and sample inputs

请提供基底材料、晶向、直径或长宽、厚度及公差；膜层材料、实测膜厚、单双面镀膜、覆盖范围、已有膜栈、退火历史和样品数量。尽量保留同片镀膜前基线，并注明测量温度、支撑方式及正反面。没有基线时先沟通参考片方案和结论限制。Provide substrate material, orientation, dimensions, thickness and tolerance; film material, measured thickness, one- or two-sided deposition, coverage, existing stack, anneal history and sample count. Retain a pre-deposition baseline on the same sample where possible, with temperature, support and face orientation. If unavailable, agree on reference samples and limitations.

常见风险与方法边界Risks and method limits

微纳Hub建议：图形化膜、多层膜、双面膜、严重翘曲或已开裂样品应先交由测试平台判断模型。整片曲率结果不能直接作为单根梁或局部图形的应力值；也不能仅凭一个应力数值证明附着力或寿命。切割后小片与原整片的结果应注明样品状态差别。MN Fab Hub guidance: ask the lab to review patterned, multilayer, two-sided, strongly warped or cracked samples before selecting a model. Wafer-level curvature cannot directly establish stress in an individual beam or feature, adhesion or lifetime. Identify sample-state differences when comparing diced coupons with full wafers.

验收清单与下一步Acceptance and next step

建议预先约定拉应力/压应力的符号、测量区域与方向、温度、重复次数、排边范围和允许偏差；报告保留前后曲率、输入膜厚、基底参数、采用的模型及不确定度说明。若关注翘曲，需单独约定参考平面和形貌指标。提交资料后先评估可测性，再确认试片、周期与报价。Agree on tensile/compressive sign convention, measurement area and directions, temperature, repeats, edge exclusion and tolerance. Request initial and final curvature, input thickness, substrate properties, model and uncertainty notes. For wafer shape, define the reference plane and metric separately. Submit inputs for a feasibility review before confirming pilots, schedule and quotation.

资料来源References

核查日期：2026-09-21。来源支撑曲率法与模型边界；送样和验收清单为微纳Hub项目沟通建议。Checked September 21, 2026. Sources support curvature methods and model limits; sample and acceptance checklists are MN Fab Hub project guidance.