source:Weienchen News release time:2021-04-26 Article author:Victoria Popular:pcb
In addition to the conventional components in PCB processing, we often encounter some special components, especially the iterative update of new products in recent years, and there are also many devices that are introduced and new, such as today’s protagonist LGA.
1. Background
LGA, that is, no solder ball array package, similar to BGA, but without solder balls.
2. Process characteristics
For bottom surface-end package, the distance between the bottom of the package and the PCB surface (Stand-off) is very small after soldering, generally only 15-25um, and the flux residue will often bridge. At the same time, the solvent in the flux for PCB patch processing is generally not easy to volatilize, forming a viscous shape instead of a general solid state. Since most of the solvents in the flux use alcoholic organic compounds, which have hydrophilic characteristics, if there is a bias voltage between adjacent pads, it may leak.
LGA components
3. Assembly process
Generally, the center-to-center distance of the LGA pads is relatively large, and the 1.27mm design is mostly adopted. The key to the Smt soldering process is to ensure that the flux activator is completely volatilized and decomposed. Therefore, a longer preheating time, a higher soldering peak temperature, and a longer soldering time should be used.
Long heating time: designed to completely volatilize the solvent in the flux.
High welding peak temperature and long welding time: aiming to make the activator decompose completely or volatilize completely.
4. Design
It is recommended to use solder mask to define the pad design, which helps to ensure the separation of the solder around the LGA pad.
Read recommendations:
Six-layer Immersion Gold Board (BGA)
Silver oil perforated plate (double-sided)
Six-layer Immersion Gold Board (BGA)
Shenzhen circuit board factory: printed circuit board knowledge to know when purchasing
Popular recommended products
High frequency PCB
2021-04-27Display board (six layers)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-05-24High frequency PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Computer card board (four layers)
2021-04-25Laminate copper-based PCB after 4L (sample)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Aluminum substrate (double-sided)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-05-24Single copper base PCB
2021-04-27Silver oil perforated plate (double-sided)
2021-04-27Network communication board (sixth floor)
2021-04-29Mobile phone template (six layers)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Single-sided double-layer AL base PCB
2021-04-27High frequency PCB
2021-04-27High frequency PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-26DIP plugin
2021-05-27SMT stickers
2021-05-27Mobile phone board
2021-05-27DIP plugin
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-04-26Six-layer Immersion Gold Board (BGA)
2021-04-26Mobile phone board
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-26SMT stickers
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-04-26Related Information
SMT surface mount processing.Hybrid circuit board PCB
2024-04-15PCB enterprises should pay attention to SMT matters.Electronic components PCB
2024-04-03PCB - the core building block of electronic products.Automotive Electronics PCB
2024-03-25PCB - the bridge and link of the electronic world
2024-03-18How to define high-frequency and high-precision circuit boards.Industrial Electronics PCB
2024-03-11USB PCB interface layout and wiring requirements
2024-01-22Electrolytic capacitor PCB.Steps for using PCB pins
2024-01-15Automotive ElectronicWhat aspects should be considered when processing and manufacturing PCB boards?
2024-01-08Electrolytic capaciWhat is the difference between a gold-plated circuit board and a gold-plated one?
2023-12-25When grinding PCB boards, attention should be paid to.Oscillator (belonging to crystal) PCB
2023-12-18Industrial Electronics PCB!What precautions should be taken when copying and grinding PCB boards
2023-12-11Do you know who is more suitable for LED direct display, regarding the difference between PCB board
2023-12-05Aluminum electrolytic capacitor PCB.What are the standards for selecting PCB boards
2023-11-27Surface Mount Technology (SMT) Phase PCB
2023-11-20Oscillator (belonging to crystal) PCB.The main functions of PCB board
2023-11-13What is the difference between RO filter and PCB filter
2023-11-06Method for determining blind hole PCB board
2023-11-01Electronic Manufacturing Services PCB!What are the effects of PCB board color on performance?
2023-10-23Introduction to the Manufacturing Steps and Requirements of PCBA Test Stand
2023-10-16PCB version maturity stage.AOI circuit board price
2023-09-25How to maintain a PCB circuit board
2023-09-19Development Trend of Printed Circuit Board.Zener diode PCB Vendor
2023-09-14Common problems and cause analysis of PCB circuit board sampling.Zener diode PCB price
2023-09-08What are the issues that need to be understood in PCB circuit board design?IGBT module PCB factory
2023-09-08How to reduce the risk of bending and deformation in PCB circuit board production?Inverter PCB Produ
2023-08-16What are the three main factors that constitute welding defects in PCB circuit boards?Multilayer PCB
2023-08-16The structure of a glass teapot.LCD Module PCB factory
2023-08-11Glass teapot.Inverter PCB Processing
2023-08-11PCB online debugging
2023-08-08PCB offline programming
2023-08-08
CopyRight © 2007-2024Shenzhen Weienchen Technology Co., Ltd.
粤ICP备2021061255号
Address:
1205, Floor 12, Building 3, Chuangyi Office Building, No. 110, Ziheng West Road, Jinsha Community, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China
Tel:
+86-755-29662580
Email:
sales@victoriapcb.com
PCB
PCBA
Service
Process
Tel: +86-755-29662580
Email: sales@victoriapcb.com
中
current position:
