PCBニュース - PCBはんだマスクプロセス

PCBはんだマスクプロセス

はんだマスクは、PCBの表面に印刷されたインクの層である. それだけでなく、絶縁の役割を果たす, しかし、銅表面を保護する役割も果たします. また、美しい役割を果たす. それは、PCB校正の外側で着られる衣類のようです. どんな欠点も見つけるのは簡単だ, したがって、ソルダーマスクはまた、すべてのプロセスの中で顧客の不満に最も傾向があります. に PCBはんだマスクプロセス, また、スマートで経験豊富な場合は、様々な品質の問題に遭遇することがあります. 次の深センサーキットボードメーカーはあなたのためにいくつかの共通の問題をまとめている, そして希望を刺激し、あなたを助ける. The common ones are as follows:

Problem: penetration, blur
Reason 1: The ink viscosity is too low.
改善策：希釈剤を加えずに濃縮を増やす.
理由2：スクリーン印刷圧力が高すぎる.
改善策：圧力を減らす.
理由3：悪いスキージ.
改善措置：交換するか、スキージスクリーンの角度を変えてください.
理由4：スクリーンと印刷面の間の距離が大きすぎるか、小さすぎる.
改善策：間隔調整.
理由5：シルクスクリーンの張力が小さくなる.
改善策：再再構築する新しい画面のバージョン.

Problem: sticky film
Reason 1: The ink is not baked dry
Improvement measures: check the ink dryness
Reason 2: The vacuum is too strong
Improvement measures: check the vacuum system (can not add air guide)

Problem: Poor exposure
Reason 1: Poor vacuum
Improvement measures: check the vacuum system
Reason 2: Improper exposure energy
Improvement measures: adjust the appropriate exposure energy
Reason 3: The temperature of the exposure machine is too high
Improvement measures: check the temperature of the exposure machine (below 26°C)

Problem: White spots in printing
Reason 1: White spots in printing
Improvement measures: mismatched diluents, use matching diluents [please use the company's supporting diluents]
Reason 2: The sealing tape is dissolved
Improvement measures: switch to white paper to seal the net

Problem: Excessive development (corrosion test)
Reason 1: The concentration of the potion is too high and the temperature is too high
Improvement measures: reduce the concentration and temperature of the potion
Reason 2: Development time is too long
Improvement measures: shorten the development time
Reason 3: insufficient exposure energy
Improvement measures: increase exposure energy
Reason 4: The developing water pressure is too large
Improvement measures: lower the developing water pressure
Reason 5: Ink mixing is uneven
Improvement measures: stir the ink evenly before printing
Reason 6: The ink is not dried
Improvement measures: Adjust the baking parameters, see the question [The ink does not dry]

Problem: the ink won't dry
Reason 1: The oven exhaust is not good
Improvement measures: check the exhaust air condition of the oven
Reason 2: The oven temperature is not enough
Improvement measures: Determine whether the actual temperature of the oven reaches the required temperature of the product
Reason 3: Put less thinner
Improvement measures: increase diluent, fully dilute
Reason 4: The thinner dries too slowly
Improvement measures: use matching thinner [please use the company's supporting thinner]
Reason 5: The ink is too thick
Improvement measures: appropriately adjust the ink thickness

Problem: Green Oil Bridge Broken Bridge
Reason 1: Insufficient exposure energy
Improvement measures: increase exposure energy
Reason 2: The board is not handled properly
Improvement measures: check the treatment process
Reason 3: Too much pressure for developing and washing
Improvement measures: check the developing and washing pressure

Problem: post-bake oil
Reason 1: There is no segmented baking
Improvement measures: segmented baking
Reason 2: Insufficient viscosity of plug hole ink
Improvement measures: adjust the ink viscosity of the plug hole

Problem: Poor upper tin
Reason 1: The development is not clean
Improvement measures: improve several factors of poor development
Reason 2: Post-baking solvent contamination
Improvement measures: increase oven exhaust or machine cleaning before spraying tin

Problem: Foaming on the tin
Reason 1: Excessive development
Improvement measures: improve the development parameters, see the problem [over development]
Reason 2: The pre-treatment of the board is not good, and the surface is oily and dusty
Improvement measures: do a good job of pre-treatment of the board and keep the surface clean
Reason 3: insufficient exposure energy
Improvement measures: check the exposure energy and meet the ink usage requirements
Reason 4: Abnormal flux
Improvement measures: adjust flux
Reason 5: Insufficient post-baking
Improvement measures: baking process after inspection

Problem: Ink discoloration
Reason 1: Insufficient ink thickness
Improvement measures: increase ink thickness
Reason 2: Oxidation of the substrate
Improvement measures: check the pre-treatment process
Reason 3: The post-baking temperature is too high
Improvement measures: too long time after checking the baking parameters

Problem: The development is not clean
Reason 1: The storage time after printing is too long
Improvement measures: control the placement time within 24 hours
Reason 2: The ink runs out before development
Improvement measures: work in the darkroom before developing (the fluorescent lamp is wrapped in yellow paper)
Reason 3: Not enough developing potion
Improvement measures: the temperature is not enough, check the concentration and temperature of the medicine
Reason 4: Development time is too short
Improvement measures: extend the development time
Reason 5: Exposure energy is too high
Improvement measures: adjust the exposure energy
Reason 6: The ink is over-baked
Improvement measures: adjust the baking parameters, not to burn to death
Reason 7: Ink mixing is uneven
Improvement measures: stir the ink evenly before printing
Reason 8: The thinner does not match
Improvement measures: use matching thinner [please use the company's supporting thinner]

Problem: ink matt
Reason 1: The thinner does not match
Improvement measures: use matching thinner [please use the company's supporting thinner]
Reason 2: Low exposure energy
Improvement measures: increase exposure energy
Reason 3: Excessive development
Improvement measures: improve the development parameters, see the problem [over development]

Problem: Blocking the Internet
Reason 1: Drying is too fast.
改善措置：遅い乾燥剤を加えてください.
理由2：印刷速度が遅すぎる.
改善策：速度を上げて、乾燥剤を遅くしてください.
理由3：インクの粘度が高すぎる.
改善策：インク潤滑剤または余分の遅い乾燥剤を加えてください.
理由4：シンナーは適していません.
改善措置：指定された思考者を使用.

Problem: Ink adhesion is not strong
Reason 1: The ink model is not suitable.
改善措置：適切なインクの使用.
理由2：インクモデルは適していない.
改善措置：適切なインクの使用.
理由3：乾燥時間と温度が不正確で、乾燥中の排気量が小さすぎる.
改善措置：正しい温度と時間を使用してください, 排気量を増加させる.
理由4：添加物の量が不適切であるか、不適切です.
改善措置：用量を調整するか、他の添加物に切り替える.
理由5：湿度が高すぎる.
改善策：空気乾燥を改善する.

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