Micro AI Smart Hardware PCBA

This is an AI smart hardware PCBA with finished dimensions of 26mm×20mm. It adopts an ultra-thin 0.8mm FR-4 multilayer PCB with black solder mask, delivered via one-stop PCBA services including PCB fabrication and precision SMT assembly.

The board is equipped with a QFN Bluetooth main SOC chip, PPG biometric sensor interface, IMU 6-axis sensor, battery gauge IC, LRA haptic driver, charge management IC and NOR flash chip. It integrates biometric signal collection, posture detection, Bluetooth wireless communication, Li-ion charge-discharge control and vibration alert functions.

Multiple micro board-to-board connectors are reserved to connect the PPG heart rate & SpO2 sensor, lithium battery and LRA linear resonant actuator. Featuring compact layout and high-density miniature components, this board requires fine PCB routing, micro-component placement and strict RF impedance control. It is widely used for small wearable devices and AI monitoring hardware.

Juehui Weiye Circuit provides custom PCBA services for ultra-thin, micro high-density consumer medical and wearable products. We support 0201 tiny component placement, precision QFN soldering and full AOI inspection, available for small-batch prototyping and mass production.

1. Basic Specifications

PCBA Finished Size: 26mm × 20mm

PCB Material: FR-4 multi-layer board, high-TG ultra-thin substrate

Board Thickness: 0.8mm

PCB Surface Finish: ENIG (Electroless Nickel Immersion Gold)

Minimum Trace Width / Spacing: 0.065mm / 0.065mm

Minimum Hole Size: 0.1mm

Core Packages: 0201/0402 SMT resistors & capacitors, QFN main IC, QFN sensor IC, micro board-to-board connectors

Minimum Pin Pitch: 0.4mm (QFN)

Total Solder Joints: approx. 980 joints (SMT solder joints only)

2. BOM & Component Function Description

1. SMT Capacitor (0201/0402)

Function: Power supply decoupling and filtering, suppress high-frequency noise, stabilize chip power supply and reduce power ripple.

2. SMT Resistor (0201/0402)

Function: Signal voltage division, current limiting, pull-up / pull-down, battery voltage sampling and sensor gain configuration.

3. QFN Bluetooth Main SOC Chip

Function: Core processor of the whole device, running sleep-aid algorithms, Bluetooth wireless data transmission, peripheral scheduling, signal acquisition and data computing.

4. IMU 6-axis Sensor (QFN)

Function: Detect posture and acceleration, track body turning and sleeping posture for sleep motion data collection.

5. Battery Gauge IC

Function: Detect remaining Li-ion battery capacity, monitor battery status, calculate power level and implement battery protection.

6. LRA Haptic Driver IC

Function: Drive LRA linear resonant actuator to realize vibration wake-up and sleep-aid haptic feedback.

7. Charge Management IC

Function: Control CC/CV charging for lithium batteries, with over-voltage, over-current and over-temperature charging protection.

8. NOR Flash Memory Chip

Function: Store firmware, sleep logs and user configuration parameters.

9. Micro Board-to-board Connectors (MOMO, VBAT, PPG ports)

Function: External interface for lithium battery, PPG biometric sensor and LRA motor to interconnect power and signals.

10. LED Indicator

Function: Visual indication for power, charging and working status.

11. Antenna Pad (ANT)

Function: Transmit and receive Bluetooth RF signals for wireless communication.

>

> Total Component Categories: 11 types; Total Component Quantity: 89pcs

3. Manufacturing Process

Process Flow: PCB Fabrication + Precision SMT Mounting + Inspection + Firmware Programming

1. PCB Fabrication: Ultra-thin 0.8mm multi-layer PCB with black solder mask and ENIG finish; fine trace width & spacing plus RF impedance control.

2. SMT Assembly: 10-zone lead-free reflow soldering for 0201 miniature R/C components, QFN ICs and micro connectors.

3. Quality Inspection: AOI optical inspection to eliminate cold solder, component offset and missing parts; continuity & connectivity testing.

4. PCBA Application Fields

1. Smart Hardware: AI intelligent monitoring module, mainboard for smart tracking devices

2. Wearable Health Devices: Sleep wristbands, sleep monitoring sensor boards

3. Consumer Medical Hardware: Heart rate, SpO2 and biometric vital sign acquisition modules

4. Small Bluetooth IoT Terminals: Low-power wireless sensor acquisition boards

5. One-stop Turnkey PCBA Service Advantages of Juehui Weiye Circuit

With 11 years of experience in high-complexity one-stop PCBA customization, Juehui Weiye Circuit specializes in ultra-thin, micro high-density PCBA for smart wearables and health monitoring equipment.

✅ Manufacture ultra-thin rigid PCB (0.8mm and below); support precision SMT placement for 0201 miniature components;

✅ One-stop delivery including multi-layer PCB fabrication, SMT assembly and full testing;

✅ Support fast small-batch prototyping and medium-volume mass production;

✅ Custom B2B manufacturing service for smart hardware, consumer medical, IoT, industrial control and other industries.

The company has obtained ISO9001 and ISO13485 medical-grade quality management certifications. All products comply with international environmental standards including REACH, RoHS and UL.

We can meet your demands for rapid small-batch prototyping, medium-batch trial runs and mass production. Customizable PCB layer count, board thickness, surface finish, RF impedance design and full test solutions.

Equipment manufacturers and solution companies in consumer medical, smart wearables, AI hardware, security, IoT and communication industries are welcome to send drawings, BOM and centroid files for sample evaluation.

Order Instructions

Please provide PCB Gerber files, BOM list, centroid files and test specifications. We offer one-stop quotation and production evaluation covering PCB manufacturing, precision QFN SMT assembly and functional testing.

Board material, thickness, PCB layers, surface finish and component selection can all be customized as required.

📞 Tel: +86 189-2464-6170

📧 Email: szjhpcb@vip.126.com

🌐 Website: https://www.szjhpcba.com/