| Material Code（Click on the grade number to enter the substrate product） | ST | HR | HP | A-99 | A-99.6 | A-99.9 | 3Y-ZrO₂ | ZTA | ALN | |||
| Alumina Content | wt | % | ＞96% | ＞90% | ＞99.3% | ＞99% | ＞99.6% | ＞99.9% | ZrO₂ | AI₂O₃/ZrO₂ | ALN | |
| Appearance | White | White | Light yellow | Light yellow | White | White | Light yellow | Light yellow | Grey/Light yellow | |||
| Surface Roughness | Ra | μm | 0.2~0.6 | 0.2~0.5 | 0.1~0.3 | 0.15~0.4 | 0.1~0.3 | 0.1~0.2 | 0.1~0.2 | 0.1~0.2 | 0.2~0.6 | |
| Density | Drainage Method | g/cm³ | ≥3.70 | ≥3.75 | ≥3.90 | ≥3.80 | ≥3.90 | ≥3.90 | ≥6.0 | ≥4.10 | ≥3.30 | |
| Light Reflectivity | 450nm/1mm | % | 94 | ≥98 | 90 | 85 | / | / | / | 97 | / | |
| Mechanical Characteristics | Flexural Strength | Three Point Bending Resistance |
MPa | ＞380 | ＞380 | ＞470 | ＞400 | ＞470 | ＞500 | ≥800 | ＞650 | ＞380 |
| Fracture Toughness | Indentation Method |
MPa·m½ | 3.0 | 3.0 | 3.2 | 3.2 | 3.2 | 3.2 | 7 | 4.0 | 3.0 | |
| Vickers Hardness | Load 4.9N | GPa | 14 | 14 | 15 | 15 | 16 | 16 | 12 | 15 | 12 | |
| Young's Modulus | Stretching Method |
GPa | 330 | 330 | 350 | 350 | 350 | 350 | 220 | 310 | 320 | |
| Thermal Characteristics |
Coefficient of Linear Thermal Expansion |
25~800℃ | ×10⁻⁶/k | 7.8 | 7.7 | 7.8 | 7.9 | 7.9 | 7.9 | 10.5 | 8.0 | 5.2 |
| Thermal Conductivity | 25℃ | W/(m·k) | ＞22 | ＞22 | ＞28 | ＞27 | ＞29 | ≥29 | ≥25 | ＞27 | ＞170 | |
| Specific Heat Capacity | 25℃ | J/(kg·k) | 750 | 750 | 780 | 780 | 780 | 780 | 500 | 720 | 720 | |
| Electrical Characteristics |
Dielectric Constant | 1MHz,25℃ | - | 9.4 | 9.4 | 9.8 | 9.8 | 9.8 | 9.8 | 30.0 | 10.4 | 9.0 |
| Dielectric Loss Angle | 1MHz,25℃ | ×10⁻⁴ | ≤3 | ≤3 | ≤2 | ≤3 | ≤2 | ≤2 | / | ≤3 | ≤2 | |
| Volume Resistivity | 25℃ | Ω·cm | ≥10¹⁴ | ≥10¹⁴ | ≥10¹⁵ | ≥10¹⁵ | ≥10¹⁵ | ≥10¹⁶ | ≥10¹³ | ≥10¹⁴ | ≥10¹⁴ | |
| Dielectric Strength | DC | KV/mm | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥11 | ≥15 | ≥15 | |
| SIZE AND TOLERANCES OF CERAMIC SUBSTRATES | ||||||
| Items Species | Stamped Substrates | Lasered Substrates | ||||
| Qualified | Fine | Qualified | Fine | Perfect | ||
| Length Tolerances | d≤0.635 | ±0.7% Min ±0.10 |
±0.5% Min ±0.05 |
+0.20 -0.05 |
+0.15 -0.05 |
+0.10 -0.05 |
| 0.635<d≤1.0 | +0.25 -1.00 |
+0.20 -0.05 |
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| 1.0<d≤1.2 | +0.30 -0.10 |
+0.25 -0.10 |
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| Thickness Tolerances | ±10% Min：±0.06 |
±7% Min：±0.05 |
±10% Min：±0.05 |
±7% Min：±0.05 |
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| Distance Tolerances Between Snap-lines or Holes | ±0.6% Min：±0.10 |
±0.5% Min：±0.05 |
±0.05 | ±0.05 | ||
| Hole Diameter Tolerances | ±0.8% Min：±0.06 |
±0.7% Min：±0.05 |
±0.075（d≤0.635） | ±0.05（d≤0.635） ±0.075（d>0.63） |
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| Tolerance of Distance from Edge to Snap-line or Hole | d≤0.635 | ±0.6% Min：±0.10 |
±0.5% Min：±0.05 |
+0.15 -0.05 |
+0.15 -0.05 |
+0.10 -0.05 |
| 0.653<d≤1.0 | +0.20 -0.05 |
+0.20 -0.05 |
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| 1.0<d≤1.2 | +0.25 -0.10 |
+0.25 -0.10 |
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| Overall Camber | 0.3% Min: 0.10 |
0.2% Min: 0.05 |
0.3% Min: 0.05 |
0.2% Min: 0.05 |
0.2% Min: 0.05 |
|
| Perpendicularity | ±0.4% Min: ±0.10 |
±0.3% Min: ±0.05 |
Within Outside Dimension Tolerance | |||
| Parallelism | ±0.4% | ±0.3% | ||||
| Radii and Corners | Min:：±0.2 | Min:：±0.2 | - | - | - | |
|
Thickness Min 0.2mm Max 3.0mm Length Max 420mm Width Max 240mm ф Hole diameter Min 0.07mm Distance from edge to hole or snap-line,Min 0.8mm Distance between holes,Min 0.8mm |
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Technical Support：Ruituoyun
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