Overview: Business cards are often used when conducting business-related activities but in this era, traditional paper business cards simply are not enough in terms of attracting the attention of other parties or partners. This article, by FSテクノロジー, will teach you how to make a modern, practical PCB名刺 which will make you stand out from other competitors.
- の製造工程をご紹介します。 high-end PCB business cards with NFC (Near Field Communication) functionality
- NFCチップ 1kb
Simple Printed Circuit Board Business Card Manufacturing Process
Making the PCB schematics
Although other PCB設計ツール may be used, EasyEDA is recommended by us to draw the PCB schematics as it has a built-in simulator for signal measurements. You can also find the required circuit schematics of the components in the EasyEDA library.
- Import the desired pattern into layer 22 “bPlace” and it will appear on the silkscreen of the PCB, above the black solder mask.
- Introduce light on layer 16 “Bottom”, which will be seen as copper traces covered by the black solder mask.
PCB Business Card Template Design
パネル上部に個人情報（名前、電話など）を記録する必要があるため、グランドプレーンの一部をカスタマイズし、レイヤー29「tStop」に表示する情報を入力する必要があります。このレイヤーは、トップを制御するソルダーレジストです。トップと "tStop" レイヤーにテキストを重ねることで PCB 名刺をより良く見せることができます。
Precautions for assembly of business card components
Before proceeding with PCB assembly, you need to know the rules of PCB部品の向き. To make your PCB business card more beautiful, you can place the components on the bottom of the PCB board and place the LED on the bulb filament. If you’re making an NFC-enabled business card, you’ll need to connect wires to the NFC IC.
Generating Gerber files
Gerber files are used by the PCB industry to “describe” PCB images and are required whether you are making your own DIY PCBAボード or outsourcing the fabrication to a professional turnkey PCBA assembly company, such as FS Technology. After completing the schematic diagram, you can click the “convert” button in EasyEDA to convert the schematic diagram into a PCB design or if you are using Eagle, you can export Gerber files by using the built-in CAM processor.
Ordering your PCB board
If you want a high-quality PCB business card, you can send your order to FS Technology as we have the most advanced equipment, a highly-trained technical team and the cheapest price. As professional PCB manufacturing experts in China, we recommend the following designs for your custom board:
- PCB thickness: 1.0 mm
- Size: 50×80 mm
- 銅製 重量：1オンス
The purpose of a PCBA board is to connect the different components through the “lines” or traces on the bare board to achieve different functions, primarily electrical conductivity between components, so PCBアセンブリ is an essential part of completing the circuit. For this, you will need to solder the SMD部品 to the PCB board, then use the programmer to write the code into the microcontroller and finally do a プリント基板組立検査.
You can use foam double-sided tape to seal the edge of your assembled PCBA board by printing a mask to then put on the foam double-sided tape. Subsequently, you can cut off any excess tape to complete your creative PCB business card.
NFC, also known as Near Field Communication, is a contactless identification and interconnection technology (similar to Bluetooth PCB) which enables your mobile devices and consumer electronics to communicate within a range of < 10 cm. In recent years, devices used in popular mobile payment, identity authentication, transportation card recharge, etc all have been relying on NFC.
The NFC working mode is divided into two modes, passive and active mode, but this article will only describe the active mode. When the signal-sending device sends data to the target device, it must generate a radio frequency field, which can then use the electromagnetic induction between the two loop antennas to charge the passive target (tag), as shown in the figure:
- Embedded energy harvesting module
If you use a printed circuit board as a business card, the NFC chip is at its heart and although the choice of the core can be varied, this article will recommend NXP’s NTAG NT3H1101 IC. Many electronics enthusiasts have programming abilities, they can do ICプログラミング by themselves to get more functions.
NTAG i2c is the latest passive TAG chip with an I2C interface released by NXP, which is an agent of the Dalian Dapinjia group. It is widely used in household appliances, consumer electronics, wearable technology, home automation and other fields as it provides both contactless and contact interfaces as shown:
In order for the PCB business card to communicate and power up, we need to add an antenna to the NFC tag. The antenna design of the NFC chip is relatively simple, as shown below:
- Voc: Magnetic field-induced open circuit voltage
- La: 等価インダクタンス
NFC IC の抵抗 Rs は、アンテナ抵抗 Ra と共に共振回路 RLC を形成し、内蔵の の静電容量Csと、アンテナのインダクタンスLaを比較します。
Resonant frequency formula parameters explanation:
- L: 等価インダクタンス、単位。H
- C: 等価静電容量、単位。F
例NFC の周波数を 13.56MHz とし、同調容量を 50pF とすると、インダクタンス L は次の式で求められる。
Only by obeying the geometric constraints, we can add a specific inductance antenna to the PCB board. Antennas with different geometries require different formulas to support them. In order to facilitate the explanation, FS Technology uses a relatively simple rectangular antenna to design PCB business cards, as shown in the following figure:
- A0 & B0: Overall size of the antenna
- Aavg & Bavg: Average size of the antenna
- T: Track thickness
- G: トラック間のギャップ
- D: トラックの等価直径
Solder the NFC chip onto the PCB visiting card
Soldering the PCB components is a relatively important step to any complete PCB product but whether it is before or after soldering, プリント基板洗浄 is an essential preliminary step. After cleaning is completed, PCBフラックス needs to be prepared in advance. Flux can act as a temporary glue by applying it to the IC package with a toothpick, and when the flux is added, you can use tweezers to hold the circuit board components in place. Then, use a new toothpick to take a small amount of solder paste and place it on the pins of the components. Both flux and solder paste is commonly used when it comes to soldering SMD components as these techniques are much more accurate compared to standard through-hole soldering. Remember to always control the amount of solder paste used as overusing solder paste is a common problem with many hobbyists new to soldering and it can cause サーキットボードショート. The final step of the soldering process is to use a hot air rework tool to melt the solder paste and solder the IC’s pins to the circuit tracks. With the use of a hot air rework tool, it eliminates the need for a traditional soldering iron which can be a bit more tricky to solder such miniature components with, especially by hand. After this process, it is always recommended to visually check the connectivity of each component to ensure that there are no solder bridges or misalignments of components. A microscope may be useful for smaller components. To enhance the look of your PCB visiting card, you can use a pre-prepared soldering iron to remove the excess flux in addition to Q-tips and isopropyl alcohol for cleaning. Resistors and LEDs operate in almost the same way and can be soldered with the above steps. Overall, soldering the NFC IC by hand is by far the hardest step in this project and even the slightest mistake can lead to a short circuit. If mistakes are made during this process, it is recommended that you know some skills of デソルダーリングPCBコンポーネント as it can help reduce losses in the case of any mistakes. Similar to many other skills, constant practice of SMD soldering is the best way to improve your soldering techniques and could be a very helpful skill when working on other projects involving SMD components.
NFC chip IC programming
- NFC Tools for Android: Find the settings menu on your Android device and open the NFC settings.
- iOS NFC Tool: The NFC tool on your iOS device (iPad, iPhone, etc) will start automatically. Launch the NFC tool, find the “Write” button, click “Add Record”, select “URL” as the record, enter the URL you want the NFC tool to transmit, click the “OK” button and then enter the NFC tag on the “Write” page. When the dynamic icon is displayed, hold the phone close to the business card and the LED on the business card should light up. When the icon shows “Writing completed”, your NFC PCB business card is complete.