lead frame产品知识
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Leadframe知识简介概述
Leadframe是一种用于制作集成电路的技术,它是由金属制成
的电路板,通常用于连接半导体芯片和外部电路。
Leadframe的主要用途是在芯片封装的过程中提供支撑和引线,并将芯片连接到外部电路中。
它通常由铜合金或镍合金制成,具有高强度、导热性能好、易加工性强等特点。
制作Leadframe的主要工艺包括蚀刻、丝印、成型等步骤。
蚀
刻是指将铜或镍材料在化学溶液中进行蚀刻,形成所需的芯片引线和支撑结构。
丝印是指在Leadframe的表面上印上必要的
标记,如型号、生产日期等。
成型是将Leadframe加工成所需
的形状和尺寸。
在Leadframe的设计中,需要考虑多方面因素,如安装复杂程度、尺寸、电路连接方法等。
同时,还需要考虑到耐腐蚀性和高温性能等问题,因为Leadframe通常需要在高温和腐蚀环境
下使用。
Leadframe被广泛应用于电子设备制造领域,如手机、计算机、汽车电子等。
它可以实现芯片与外部电路的可靠连接,并提高电子设备的性能、可靠性和效率。
除了Leadframe,还有一些其他的芯片封装技术,如球型焊盘(BGA)、裸晶片(Die Bonding)等。
它们各自具有不同的
优缺点,需要根据具体情况选择最适合的封装方式。
总的来说,Leadframe是一种重要的集成电路封装技术,它在电子设备制造中具有广泛的应用前景。
未来,随着电子设备的不断发展和升级,Leadframe技术也将不断提升和完善。
冲压引线框架的制造工艺流程英文回答:The manufacturing process of stamping lead frames involves several steps to ensure the production of high-quality frames. Let me walk you through the process.1. Design and Engineering: The first step is to design the lead frame according to the specific requirements of the product. This involves creating a 2D or 3D model of the frame and determining the dimensions, material, and layout. Engineers use computer-aided design (CAD) software to create the design.2. Material Selection: Once the design is finalized, the next step is to select the appropriate material for the lead frame. Common materials used in lead frame manufacturing include copper alloys, such as phosphor bronze or brass. The material should have good electrical conductivity, thermal conductivity, and corrosionresistance.3. Material Preparation: The selected material is then prepared for the stamping process. This involves cutting the material into the desired size and shape, typically in the form of a strip or sheet. The material may undergo surface treatment, such as cleaning or coating, to improve its properties.4. Stamping: The prepared material is fed into a stamping press, where a die and a punch are used to shape the lead frame. The stamping process involves applying high pressure to the material, causing it to deform and take the shape of the die. The stamping press can be either mechanical or hydraulic, depending on the requirements of the project.5. Trimming and Forming: After the stamping process, the excess material is trimmed off, and the lead frame is formed into its final shape. Trimming is done using a cutting tool or a die, while forming may involve bending, folding, or curling the frame. These steps ensure that thelead frame has the desired dimensions and shape.6. Cleaning and Inspection: The stamped lead frames are then cleaned to remove any debris or contaminants. This is important to ensure the frames are free from defects and ready for further processing. After cleaning, the frames undergo a thorough inspection to check for any dimensional or visual defects. Automated inspection systems or manual inspection techniques may be used for this purpose.7. Surface Treatment: Depending on the application, the lead frames may undergo additional surface treatment processes, such as plating or coating. Plating can enhance the electrical conductivity and corrosion resistance of the frames, while coating can provide insulation or improve solderability.8. Packaging and Delivery: Once the lead frames pass the inspection and surface treatment, they are packaged and prepared for delivery to the customer. The packaging may vary depending on the size and quantity of the frames. Common packaging methods include trays, reels, or tubes.中文回答:冲压引线框架的制造工艺流程包括以下几个步骤,以确保生产出高质量的框架。
引线框架(LeadFrame)介绍引线框架(Lead Frame)是半导体IC和器件模塑封装的基本材料,它主要由两部分组成:芯⽚焊盘(die paddle)和引脚(lead finger)。
其中芯⽚焊盘在封装过程中为芯⽚提供机械⽀撑,⽽引脚则是连接芯⽚到封装外的电⽓和热量通路。
引线框架有三个主要作⽤:1.为芯⽚提供机械⽀撑,在灌封以及后续使⽤中都依赖框架的⽀撑2.提供电⽓连接,沟通芯⽚和外部电路。
所有信号,电源都通过管脚传输3.提供散热散热通路,管脚相对塑封有更低的热阻,是主要的散热渠道。
对于半导体器件使⽤中需要安装在电路板PCB上,⽽这依赖引脚焊接固定到焊盘上,这引脚就是引线框架提供的。
在半导体⼯艺上,硅⽚芯⽚die,放置在pad上,然后使⽤⾦线通过引线键合Wire Bond⼯艺,把硅⽚与对应引脚连接起来。
然后再注塑⽤EMC把芯⽚灌封成需要的外形。
在半导体中,引线框架主要起稳固芯⽚、传导信号、传输热量的作⽤,需要在强度、弯曲、导电性、导热性、耐热性、热匹配、耐腐蚀、步进性、共⾯形、应⼒释放等⽅⾯达到较⾼的标准。
根据引线框架在封装体中的作⽤,要求引线框架具备以下性能:1.良好的导电性能:引线框架在塑封体中起到芯⽚和外⾯的连接作⽤,因此要求它要有良好的导电性。
现代芯⽚⼯作频率越来越⾼,为减少电容和电感等寄⽣效应,对引线框架的导电性能要求就⾼,导电性越⾼,引线框架产⽣的阻抗就越⼩。
⼀般⽽⾔,铜材的导电性⽐铁镍材料的导电性要好。
2.良好的导热性:集成电路在使⽤时,总要产⽣热量,尤其是功耗较⼤的电路,产⽣的热量就⼤,因此在⼯作时要求主要结构材料引线框架能有好的导热性,否则在⼯作状态会由于热量不能及时散去⽽"烧坏"芯⽚。
导热性⼀般可由两⽅⾯解决,⼀是增加引线框架基材的厚度,⼆是选⽤较⼤导热系数的⾦属材料做引线框架。
3.良好的热匹配(即热膨胀):材料受热产⽣膨胀,在封装体中,引线框架和塑封体的塑封树脂相接触,也和芯⽚间接接触,因此要求它们有⼀个良好的热匹配。
引线框架(Leadframe):
2010-05-04 14:38:13| 分类:铜带应用:引线框 | 标签:引线引脚 leadframe 框架集成电路|字号订阅
引线框架作为集成电路的芯片载体,是一种借助于键合金丝实现芯片内部电路引出端与外引线的电气连接,形成电气回路的关键结构件,它起到了和外部导线连接的桥梁作用,绝大部分的半导体集成块中都需要使用引线框架,是电子信息产业中重要的基础材料。
产品类型有TO、DIP、ZIP、SIP、SOP、SSOP、QFP(QFJ)、SOD、SOT等。
主要用模具冲压法
和化学刻蚀法进行生产。
lead frame / 中文:引脚架,引线架
各种有密封主体及多双引脚的电子元件,如各种IC、网状电阻器或简单的二极管、三极管等,其主体中心与各引脚所暂时隔离固定的金属架,即为
脚架,又可称为定架。
其封装过程是,将中心部分的品片背面的金层或银层,利用高温熔接法与脚架中心的镀金层加以固定,再用金线或铝线从已焊牢固晶片的电极点与各引脚之间打线连通,然后再将整个主体用塑胶或玻璃封牢,并剪去脚架外框,并进一步弯脚成形以方便插焊或贴焊,即可得到所需的元件。
脚架在电子封装工业中占有很重要的地位,其合金材料常用Kovar、Alloy 42 及磷青铜等,脚架成形的方式有模具冲切法及化学蚀刻法等。
化学蚀刻法的引线框架的制造工艺流程The manufacturing process of lead frames for chemical etching involves various steps to ensure the quality and accuracy of the final product. The first step of the process is designing the lead frame pattern using CAD software. This step is crucial as it determines the shape and size of the lead frame, which will directly impact the performance of the electronic component it will be used for.化学蚀刻法的引线框架制造工艺流程涉及多个步骤,以确保最终产品的质量和精度。
流程的第一步是使用CAD软件设计引线框架图案。
这一步至关重要,因为它决定了引线框架的形状和大小,将直接影响其用于的电子元件的性能。
Once the design is finalized, the next step is to select the appropriate material for the lead frame. Typically, lead frames are made from materials such as copper or copper alloys due to their excellent conductivity and ability to withstand the chemical etching process. The material selection is crucial to ensure the lead frame meets the desired performance requirements.设计确定后,下一步是选择适合引线框架的材料。
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