We are very willing to share all the resources related to metal shell airtight sealing. In the process of communicating with our customers, we learn from each other and make progress, which is very beneficial for both us and our customers
Our process database has accumulated a large amount of welding process data for different materials and products, which is a huge support for us to quickly and perfectly complete various strict requirements
This column delivers in-depth analysis of cutting-edge precision laser welding technologies, sharing critical process parameters and field-proven expertise for aerospace, semiconductor, implantable medical devices, and electronic packaging sectors. Focusing on complex scenarios involving stainless steel/aluminum/Kovar alloy/titanium/dissimilar metal joining, we dissect industry challenges—from porosity control to thermal distortion management and penetration stability—through JM Laser’s extensive engineering case studies, empowering engineers to tackle material compatibility and structural integrity challenges.
Defects that are prone to occur during welding are generally blackening, collapse, splashing, porosity, incomplete penetration, cracks, undercutting, gas leakage, etc.
a smooth and flat weld seam, without welding defects such as cracks and pores, and can meet the corresponding airtightness requirements through helium mass spectrometry leak detection.
| Category | Standard | Application | Industry | Key Requirement | Region |
|---|---|---|---|---|---|
Materials |
AMS 4911H |
Aerospace Titanium |
Aerospace/Defense |
Tensile Strength≥895MPa |
🇺🇸 |
JIS H 8602 |
Anodized Aluminum |
Microwave |
Coating Thickness 25±3μm |
🇯🇵 | |
KS D 6710 |
High-Si Aluminum |
Automotive |
Si Content 12-13% |
🇰🇷 | |
Welding |
MIL-STD-2219D |
Military Laser Welding |
Defense |
Depth-to-Width Ratio≥5:1 |
🇺🇸 |
DIN 32525-4 |
Laser Weld Quality |
Industrial |
Penetration Tolerance±5% |
🇩🇪 | |
JEITA ED-4703 |
Package Reliability |
Semiconductor |
1000 Temp Cycles＜0.1% Fail |
🇯🇵 | |
Sealing Test |
MIL-STD-750E |
Military Fine Leak Test |
Defense |
He Leak Rate≤1×10⁻⁸ cc/s |
🇺🇸 |
ESCC 9030 |
Space Hermetic Sealing |
Aerospace |
Dual Leak Test Verification |
🇪🇺 | |
KS B 0895 |
Helium Leak Test (KR) |
General |
Sensitivity≤1×10⁻⁷ Pa·m³/s |
🇰🇷 | |
High-Frequency |
IPC-4103E |
RF Laminates Performance |
Microwave Circuits |
Dk±0.05@10GHz |
🌍 |
IEC 61189-5-503 |
Microwave Cavity Q Test |
RF Components |
0.1-40GHz Frequency Range |
🌍 | |
Industry Spec. |
ISO 13485:2016 |
Medical Device QMS |
Medical |
Aseptic Welding Protocol |
🌍 |
AS9100D |
Aerospace QMS |
Aerospace |
Weld Parameter Traceability |
🇺🇸 | |
GJB 548C-2021 |
Military Thermal Shock |
Defense |
-65°C↔150°C 1000 Cycles |
🇨🇳 |
The “Microelectronics Device Test Method Standard” issued by the US Department of Defense, in which Method 1071 is dedicated to helium mass spectrometry leak detection certification for high-value military devices, is the gold standard for military electronic packaging sealing testing
| Parameter | MIL-STD-750E | ISO 3530 |
|---|---|---|
Sensitivity |
1×10⁻⁸ cc/s He |
5×10⁻⁸ Pa·m³/s |
Calibration Frequency |
Daily + Pre-Test Calibration |
Weekly |
Vacuum Integrity Verification |
30-min Pressure Rise <5% |
Not Specified |
Data Integrity |
Military-grade Audit Trail |
Basic Electronic Records |
