... those negative planes!). You output the 274X and IPC-D-356 netlist files. The data are fed into a fab analysis tool and run through their | CIRCUIT BOARDS | paces. Clearances are good. No possible soldermask flaking. Spacing between the drills is just right. You hand the data set to the fabricator, and voila! | CIRCUIT BOARDS | No unexpected phone calls, no changes in the layout, and the fabricator happily sends back a good set of boards on time. Our recommendations for | CIRCUIT BOARDS | the correct storage of PCBs and MLBs A.1 ) Brief desricption of the problem: PCB`s, especially Multilayer boards are extremly sensitive towards moisture The microscopic | CIRCUIT BOARDS | structure of the Multilayer material develops a strong capillary power that soaks up the humidity of the surrounding air. Even under very dry conditions it | CIRCUIT BOARDS | is a question of time that water accumulates in the stored PCB`s. For example: At storage conditions of 20 C° and 35 % of humidity | CIRCUIT BOARDS | the weight of the epoxyraisin of the Multilayer PCB`s rises 0,12 % due to the accumulation of ...
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... uncomplicated and reliable, but once the manufacturing parameters have been set they can be dependably utilised for further processing and continued use. Due to | CIRCUIT BOARDS | the thin surface layer – a thickness of 0.15 – 0.3 mµ is recommended – the surface of the pad is smoother and therefore there | CIRCUIT BOARDS | are, even in fine pitch areas, no restrictions when assembling. The silver functions merely as a protection against oxidation, and the actual solder point is | CIRCUIT BOARDS | between the copper and chemical tin, therefore the solder point is absolutely stable. It fulfills all UL requirements (UL796 specif.) and meets the usual requirements | CIRCUIT BOARDS | of automobile manufacturers: Test results Test AlphaSTAR Result Requirement SIR 85°C/85%RH 2.46+9 24h Passed >1E+8; IPC- 4553 IPC-TM-650 2.6.3.5 3.15E+9 96h Passed SIR 35°C/85%RH 100VDC | CIRCUIT BOARDS | 3.56E+11 24h Passed >1E+10; IPC-4553 and GR 78 (Bellcore) IPC-TM-650 2.6.3.5 4.62E+11 96h passed EM 10V bias, 100V Test 2.46E+9 24h initial Resistance no higher | CIRCUIT BOARDS | than the Power of 10 ...
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... die Elektronikbranche weltweit unter Druck. Von Jahresanfang bis Ende Mai stiegen die Weltmarktpreise für Metalle (Ag, Al, Au, Cu, Ni, Sn) stark an. Zwar | CIRCUIT BOARDS | fielen die Notierungen bis Anfang August wieder, sind aber immer noch erheblich höher als zu Jahresbeginn. Stellvertretend für alle Metalle sei hier Kupfer genannt. Der | CIRCUIT BOARDS | Kupferpreis stieg von... | MAKROÖKONOMISCH VOLLKOMMEN IDIOTISCH | Auszug aus "Markt&Technik" Nr. 23 vom 03.06.2005 zum Thema "Standort Deutschland II" | TROTZ SCHLECHTER RAHMENBEDINGUNGEN | | CIRCUIT BOARDS | - dass sich Leiterplatten auch am Standort Deutschland wett- bewerbsfähig produzieren lassen, davon ist Andreas Brüggen, Geschäftsführer von Precoplat, überzeugt. | DIE FRAGE, OB MAN | CIRCUIT BOARDS | IN DEUTSCHLAND NOCH WETTBEWERBSFÄHIG PRODUZIEREN KANN |, ist eindeutig mit »ja« zu beantworten. Die Grundvoraussetzungen sind zwar meiner Meinung nach schlechter als je zuvor, doch | CIRCUIT BOARDS | die schlechten Bedingungen begreifen wir als einen Appell an die Kreativität und Schaffenskraft der Unternehmer. | DAS ...
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