FR4 Surface Mount SMD PCB SMT Assembly Circuit Board 2.5mm Immersion Gold
Medical Mother Board and SMT SMD PCB Assembly
♦ What Is SMT Assembly?
SMT Assembly (Surface Mount Technology Assembly) is a modern method of mounting electronic components directly onto the surface of a printed circuit board (PCB). It is the most widely used PCB assembly technique today, replacing traditional through-hole technology (THT) in most applications due to its efficiency, precision, and ability to support miniaturized and high-density designs.
♦ What Is SMD?
An SMD is an electronic component designed specifically for surface mounting (SMT). These components have small metal pads or terminations instead of long leads.
Types of SMD Components:
♦ Common Challenges in SMT/SMD Assembly:
- Solder Bridging (unwanted connections between pads)
- Tombstoning (one end of a component lifts during soldering)
- Misalignment (components shift before reflow)
- Voiding in BGA Soldering (air gaps in solder joints)
Solutions:
✔ Proper stencil design (for accurate solder paste application)
✔ Reflow profile optimization (temperature control)
✔ AOI & X-ray inspection (for defect detection)
DQS Electronic Group is one of the leading EMS company in China, we provide PCB design, PCB manufacturing, PCB assembly service and testing. Welcome send us your Gerber file to get free quotation. Our email: sales@dqspcba.com
♦ Technical Parameters
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PCB Assembly Capability |
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Item |
Normal |
Special |
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SMT Assembly |
PCB(used for SMT) specification |
Length and Width( L* W) |
Minimum |
L≥3mm, W≥3mm |
L＜2mm |
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Maximum |
L≤800mm, W≤460mm |
L ＞ 1200mm, W＞500mm |
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Thickness( T) |
Thinnest |
0.2mm |
T＜0.1mm |
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Thickest |
4 mm |
T＞4.5mm |
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SMT components specification |
Outline Dimension |
Min size |
0201(0.6mm*0.3mm) |
01005(0.3mm*0.2mm) |
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Max size |
200 * 125 |
200 * 125 |
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component thickness |
T≤15mm |
6.5mm＜T≤15mm |
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QFP,SOP,SOJ (multi pins) |
Min pin space |
0.4mm |
0.3mm≤Pitch＜0.4mm |
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CSP/ BGA |
Min ball space |
0.5mm |
0.3mm≤Pitch＜0.5mm |
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DIP Assembly |
PCB specification |
Length and Width( L* W) |
Minimum |
L≥50mm, W≥30mm |
L＜50mm |
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Maximum |
L≤1200mm, W≤450mm |
L≥1200mm, W≥500mm |
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Thickness( T) |
Thinnest |
0.8mm |
T＜0.8mm |
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Thickest |
3.5mm |
T＞2mm |
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- On-time Delivery:
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- Owned PCBA factories 15,000 ㎡
- 13 fully automatic SMT lines
- 4 DIP assembly lines
2. Quality Guaranteed:
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- IATF, ISO, IPC, UL standards
- Online SPI, AOI, X-Ray Inspection
- The qualified rate of products reach 99.9%
3. Premium Service:
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- 24H reply your inquiry
- Perfect after-sales service system
- From prototype to mass production
Get in Touch
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