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公开(公告)号：US11521903B1
公开(公告)日：2022-12-06
申请号：US17564693
申请日：2021-12-29
发明人： Chien-Ting Wu , Ching-Kai Chou , Kai-Yi Bai , Wei-Yu Lin , Li-Hsuan Shen , Chia-Peng Sun , Chih-Chung Hsu , Rong-Yeu Chang , Chia-Hsiang Hsu
IPC分类号： H01L21/66 , H01L21/56 , G06F30/39 , G06F113/18
摘要： The present disclosure provides a method of measuring a plurality of voids in an underfill material of an underfill package. The method includes operations of obtaining a welding angle profile of the underfill package; obtaining a simulated void profile of the underfill package according to the welding angle profile; determining a plurality of high-risk void regions according to the simulated void profile; simulating, according to a selected pressure and a selected temperature of the underfill material, a first high-risk void region of the plurality of high-risk void regions to generate an updated void profile; and determining whether the updated void profile meets a void requirement of the underfill package.
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公开(公告)号：US11355361B1
公开(公告)日：2022-06-07
申请号：US17381515
申请日：2021-07-21
发明人： Yu-En Liang , Chia-Peng Sun , Chih-Chung Hsu , Rong-Yeu Chang , Chia-Hsiang Hsu
摘要： The present disclosure provides a method for measuring an underfill profile of an underfill material in an underfill cavity having a plurality of solder bumps. The method includes the operations of: determining a mesh having a plurality of elements according to the underfill cavity; calculating a reference force according to the underfill cavity; obtaining a driving force and a flow speed of the underfill material according to a plurality of weighting factors and the reference force, wherein the plurality of weighting factors respectively correspond to the plurality of elements; obtaining a plurality of volume fractions respectively corresponding to the plurality of elements according to the flow speed; and obtaining the underfill profile according to the plurality of volume fractions.
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公开(公告)号：US10960592B2
公开(公告)日：2021-03-30
申请号：US16587858
申请日：2019-09-30
摘要： A computer-implemented simulation method for use in a molding process by a computer process is disclosed. The method includes steps of specifying a simulating domain comprising a mold cavity and a barrel of an injection machine, wherein the barrel is configured to connect to the mold cavity; creating at least one mesh by dividing at least part of the simulating domain; specifying boundary conditions of the mesh by taking into consideration at least one motion of a screw in the barrel; and simulating a first injection-molding process of a molding material by using the boundary conditions to generate a plurality of molding conditions.
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公开(公告)号：US11602908B1
公开(公告)日：2023-03-14
申请号：US17564744
申请日：2021-12-29
发明人： Ching-Kai Chou , Chien-Ting Wu , Hsun Yang , Li-Hsuan Shen , Chih-Chung Hsu , Chia-Hsiang Hsu , Rong-Yeu Chang
摘要： The present disclosure provides a method of mesh generation for an RTM process, including operations of: obtaining a geometry of a target object; generating a solid mesh of the target object according to the geometry; obtaining material characteristics of the target object; assembling a runner mesh with the solid mesh, wherein the runner mesh has grid dimensions different from those of the solid mesh; determining process parameters of the RTM process; and generating a forecasted result of the RTM process according to the solid mesh, the runner mesh, the process parameters, and the material characteristics. Generating the solid mesh includes operations of: dividing the geometry into modules; generating a first and second modular meshes corresponding to a first and second modules, wherein the second modular mesh abuts the first modular mesh, and the second modular mesh has grid dimensions different from those of the first modular mesh.
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公开(公告)号：US11376776B2
公开(公告)日：2022-07-05
申请号：US17381881
申请日：2021-07-21
发明人： Chen-Chieh Wang , Yu-Ho Wen , Guo-Sian Cyue , Chih-Chung Hsu , Chia-Hsiang Hsu , Rong-Yeu Chang
摘要： The present disclosure provides a method of measuring a true shear viscosity profile of a molding material in a capillary and a molding system performing the same. The method includes the operations of: determining a setpoint temperature of the molding material before injecting into the capillary; obtaining an initial shear viscosity profile at the setpoint temperature with respect to a shear rate of the molding material; fitting an initial temperature profile with respect to the shear rate according to the initial shear viscosity based on Cross William-Landel-Ferry model; fitting a first shear viscosity profile and a first temperature profile with respect to the shear rate according to the initial temperature profile based on the Cross-WLF model; and setting the first shear viscosity profile as the true shear viscosity profile when a difference between the first temperature profile and the initial temperature profile is not greater than a threshold.
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