Active solid-state devices (e.g. – transistors – solid-state diode – Lead frame – Of specified material other than copper
Patent
1997-01-31
1998-06-16
Saadat, Mahshid D.
Active solid-state devices (e.g., transistors, solid-state diode
Lead frame
Of specified material other than copper
257766, 257748, 257768, 427328, H01L 23495, H01L 2348, B05D 300, B05D 312
Patent
active
057675740
ABSTRACT:
A semiconductor lead frame having an improved structure formed of plated layers is provided. The semiconductor lead frame has the structure of multi-plated layers in which a Ni plated layer, a Pd strike plated layer, and a Pd--X alloy plated layer are deposited on a substrate in the described order. In such a multi-plated layer structure, the Pd strike plated layer covers the porous surface of the Ni plated layer and decreases the surface roughness. Since the thickness of the outer Pd--X alloy plated layer can be maintained uniform due to the Pd strike plated layer, corrosion durability and bonding characteristics are enhanced, thus minimizing the generation and progress of cracks.
REFERENCES:
patent: 3648355 (1972-03-01), Shida et al.
patent: 4141029 (1979-02-01), Dromsky
patent: 4441118 (1984-04-01), Fister et al.
patent: 4486511 (1984-12-01), Chen et al.
patent: 4529667 (1985-07-01), Shiga et al.
patent: 4894752 (1990-01-01), Murata et al.
patent: 5001546 (1991-03-01), Butt
patent: 5138431 (1992-08-01), Huang et al.
patent: 5221859 (1993-06-01), Kobayashi et al.
patent: 5360991 (1994-11-01), Abys et al.
patent: 5454929 (1995-10-01), Kinghorn
patent: 5510197 (1996-04-01), Takahashi et al.
patent: 5561320 (1996-10-01), Abbott et al.
patent: 5618576 (1997-04-01), Baek
patent: 5650661 (1997-07-01), Mathew
patent: 5684329 (1997-11-01), Serizawa
patent: 5710456 (1998-01-01), Abbott et al.
Baek Young-Ho
Kim Joong-do
Clark Jhihan B.
Saadat Mahshid D.
Samsung Aerospace Industries Ltd.
LandOfFree
Semiconductor lead frame does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Semiconductor lead frame, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor lead frame will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1729269