Olli Nousiainen

  • Citations Per Year
Learn More
The actions of beta-sympathomimetics alone and in various combinations with alpha-adrenoceptor blocking agents were studied in guinea pig tracheal chain and in some preparations of human bronchi taken in operations. All the alpha-adrenoceptor blockers caused 50-100% potentiation of the effects of the beta-sympathomimetics studied in both preparations, had(More)
The behavior of thermomechanically loaded collapsible 95.5Sn4Ag0.5Cu spheres in LTCC/PWB assemblies with high (LTCC/FR-4; DCTE P 10 ppm/ C) and low (LTCC/Arlon; DCTE < 10 ppm/ C) global thermal mismatches was studied by exposing the assemblies into two thermal cycling tests. The characteristic lifetimes of the LTCC/FR-4 assemblies, tested over the(More)
In this paper, a reliability modeling methodology for BGA solder joints with plastic-core solder balls (PCSBs) has been presented. The methodology is applied to predict the board-level reliability of LTCC/BGA modules under accelerated thermal cycling conditions. The model takes into account both time- and temperature-dependent as well as time-independent(More)
  • OULU F INLAND, Elise Kärkkäinen, +8 authors Raimo Ahonen
  • 2010
Low-temperature co-fired ceramic (LTCC) based system-in-package (SiP) is an emerging multilayer module technology for wireless communication applications, mainly due to its excellent high-frequency material properties. LTCC-SiP modules are typically soldered onto an organic motherboard, but the lifetime of the 2nd-level solder joints is often poor due to(More)
  • 1