Ceramic-aluminum assembly with bonding trenches

An assembly comprising:

• a first ceramic member;
• a second ceramic member disposed adjacent to the first member,
• wherein at least one of the first ceramic member and the second ceramic member defines a plurality of trenches spaced a distance apart less than 2 mm;
• and
• an aluminum material disposed within the plurality of trenches and bonding the first ceramic member to the second ceramic member along adjacent faces,
• wherein a spacing between the first member and the second member along the adjacent faces is less than 5 μm and a surface roughness of the adjacent faces of the first and second ceramic members is between 5 mm and 100 nanometers, and the first ceramic member and the second ceramic member are selected from the group consisting of aluminum nitride (AlN), alumina, zirconia, and silicon carbide (SiC).

An assembly comprising:

• a first aluminum nitride (AlN) ceramic member;
• a second AlN ceramic member disposed adjacent to the first member,
• wherein at least one of the first AlN ceramic member and the second AlN ceramic member defines a plurality of trenches spaced a distance apart less than 2 mm;
• and
• an aluminum material disposed within the plurality of trenches and bonding the first ceramic member to the second ceramic member along adjacent faces,
• wherein a spacing between the first AlN member and the second AlN member along the adjacent faces is less than 5 μm and a surface roughness of the adjacent faces of the first and second ceramic members is between 5 mm and 100 nanometers.