1. Dielectric layer (Dielectric): It is used to maintain the insulation between lines and layers, commonly known as the substrate. 2. Silkscreen (Legend/Marking/Silkscreen): This is a non-essential component. Its main function is to mark the name and position box of each part on the circuit board, which is convenient for maintenance and identification after assembly. 3.Surface treatment (SurtaceFinish): Since the copper surface is easily oxidized in the general environment, it cannot be tinned (poor solderability), so the copper surface to be tinned will be protected. The protection methods include HASL, ENIG, Immersion Silver, Immersion TIn, and organic solder preservative (OSP). Each method has its own advantages and disadvantages, collectively referred to as surface treatment.● -Reliability testing ● -Traceability ● -Thermal management ● -Heavy copper ≥ 105um ● -HDI ● -Semi - flex ● -Rigid - flex ● -High frequency milimeter microwave

Layers	Mass production: 2~58 layers / Pilot run: 64 layers
Max. Thickness	Mass production: 394mil (10mm) / Pilot run: 17.5mm
Material	FR-4 (Standard FR4, Mid-Tg FR4,Hi-Tg FR4, Lead free assembly material) , Halogen-Free, Ceramic filled , Teflon, Polyimide, BT,  PPO, PPE, Hybrid, Partial hybrid, etc.
Min. Width/Spacing	Inner layer: 3mil/3mil (HOZ), Outer layer: 4mil/4mil(1OZ)
Max. Copper Thickness	UL certificated: 6.0 OZ / Pilot run: 12OZ
Min. Hole Size	Mechanical drill: 8mil(0.2mm)  Laser drill: 3mil(0.075mm)
Max. Panel Size	1150mm × 560mm
Aspect Ratio	18:1
Surface Finish	HASL,Immersion Gold, Immersion Tin, OSP, ENIG + OSP, Immersion Silver, ENEPIG, Gold Finger
Special Process	Buried Hole, Blind Hole, Embedded Resistance, Embedded Capacity, Hybrid, Partial hybrid, Partial high density, Back drilling, and Resistance control

With its compact design, this mini GPS tracker can be easily installed on any vehicle without attracting any attention. The PCBA (Printed Circuit Board Assembly) technology used in the manufacturing process ensures the highest level of performance and precision. Equipped with the latest GPS technology, this device can track your vehicle's location in real-time with incredible accuracy. One of the outstanding features of the Vehicle GPS Tracker PCBA tracking system is its user-friendly interface. Trackers can be easily controlled and monitored via dedicated mobile apps for iOS and Android devices. You can conveniently access your vehicle's location data anytime and anywhere as long as you have an Internet connection. This tracker not only provides real-time location information but also offers a wide range of additional features. For example, you can set up geofence areas that will notify you whenever your vehicle enters or leaves a specific area. This is particularly useful for monitoring driving habits or preventing unauthorized use of your vehicle. The Vehicle GPS Tracker PCBA Tracking System includes a built-in SOS button for instant emergency alerts. If an emergency occurs, just press the SOS button and the tracker will instantly send a notification to your smartphone along with the vehicle's precise location. This feature can come into play in critical situations.